Product Description

Equipped with the revolutionary 4000dpi Razer Precision 3G Laser sensor, the Razer Lachesis gaming mouse takes on the same lethal traits as its namesake that will send shivers down your enemies' spines. Add 32KB of onboard memory, nine programmable Hyperesponse buttons, as well as an impressive 1000Hz Ultrapolling with 1ms response time, and you've got a formidable weapon in your arsenal of destruction. Victory beckons - move in for the kill.

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Product Details

• Brand: Razer
• Model: RZ01-00170100
• Platform: Windows
• Original language: English
• Dimensions: 1.50" h x 2.75" w x 5.00" l, 4.50 pounds

Features

• 4000dpi Razer Precision 3G Laser sensor
• Up to 100 Inches-per-Second tracking speed
• Nine independently programmable Hyperesponse buttons
• 32KB Razer Synapse onboard memory
• On-the-Fly Sensitivity adjustment

From the Manufacturer
From the Manufacturer

Equipped with the revolutionary 4000dpi Razer Precision 3G Laser sensor, the Razer Lachesis gaming mouse takes on the same lethal traits as its namesake that will send shivers down your enemies’ spines. Add 32KB of onboard memory, nine programmable Hyperesponse buttons, as well as an impressive 1000Hz Ultrapolling with 1ms response time, and you’ve got a formidable weapon in your arsenal of destruction. Victory beckons–-move in for the kill.

	4000dpi Razer Precision 3G Laser sensor: The Razer Lachesis reigns supreme with a true 4000dpi 3G Laser sensor, which enables movement speeds of 5 times that of a standard 800dpi optical sensor
	32KB Razer Synapse onboard memory: With a 32KB onboard memory, you can store up to five unique gaming profiles.
	Nine independently programmable Hyperesponse buttons: The Razer Lachesis allows programming of button functions while Razer’s Hyperesponse technology reduces latency for optimum gameplay.

Additional Features

• 4000dpi Razer Precision 3G Laser sensor
• 32KB Razer Synapse onboard memory
• Nine independently programmable Hyperesponse buttons
• 1000Hz Ultrapolling / 1ms response time
• On-The-Fly Sensitivity adjustment
• Variable true dpi setting adjustments in increments of 125dpi
• Always-On mode
• Ultra-large non-slip buttons
• 16-bit ultra-wide data path
• 60-100 inches per second
• Ambidextrous design
• Scroll wheel with 24 individual click positions
• Zero-acoustic Ultraslick Teflon feet
• Gold-plated USB connector
• Seven-foot, lightweight, non-tangle cord
• Approximate size: 129mm (length) x 71mm (width) x 40mm (height)

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Customer Reviews

Only Skipped for 5 seconds - then I opened my eyes
The mouse works excellent. It skipped at first, then I turned it over and saw the clear soft plastic protective cover that covers the bottom of the mouse and partially interupts the laser. I removed it and the silver sticker that goes around the lazer as well and it has performed flawlessly since. Excellent for games and I do CAD with it as well. So if you're skipping, try uncovering the lazer D.A.

Razer Lachesis horrible for hardcore first person shooters
Here is my mini review of high end mice I've tried recently.

Razer Lachesis 4000 dpi Laser Gaming Mous--Banshee Blue (4000 DPI, 9 buttons): This is the first mouse that gave me actual pain my my fingers and palm after just a couple of hours use and it has just about the worst ergonomics of any mouse I've ever used. The side buttons are in a very inconvinient location. In first person shooters you'll constantly be accidentally clicking either side's buttons since they're in the area where you grip the mouse (they're designed so you need to put "extra" pressure in the grip to click them). The laser itself is pretty decent at 4000 DPI, but it is placed in the middle of the mouse instead of closer to the front, so you basically need to move the whole mouse to aim instead of the regular first person shooter "tilting the front of the mouse" aiming. Be sure to go to their web site and use the updated drivers and firmware or you'll see a lot of "mouse jumping" problems even when you're not touching the mouse. Also I noticed the mouse buttons would register as "up" as I was turning sometimes with the mouse button down (such as a Heavy in TF2 spinning his gun using the side button, which is annoying as heck). There is also no on-mouse DPI display so there's no way to know which DPI setting you're at (one of the five DPI settings you're forced into). Anyone had any good experience with this mouse?

Logitech G9 Laser Mouse (3200 DPI, 7 buttons, weights, two grip types): I used this mouse for a bit less than a year and it is by far my favorite mouse. One problem is the connector between the mouse and cord eventually went bad and then the mouse had connection issues (Google this for more information). Other than that, it has by far the best tracking and button location of any mouse I've used. I like that the DPI switching is under the left mouse button and it is easy to tell what DPI level I currently am at. Highly recommended!

Logitech 931375-0403 G7 Laser Cordless Mouse Black (2000 DPI), Logitech NEW G5 Laser Mouse (2000 DPI) and Logitech MX518 Gaming Optical Mouse - Metal (1800 DPI): If you can't afford the G9, the models to the left are similarly good. I've used and like them, but they all had tracking accuracy loss over time and needed to be replaced (generally after about 6 to 8 months of every day gaming 4+ hours a day). None of the older models have the high 3200 DPI laser, but the G5/G7 have switchable DPI levels and generally feel good and are ergonomically nice for using over long periods of time.

OCZ OCZMSDMXD Dominatrix Laser Gaming Mouse/MSI GS-501/Cyber Snipa Stinger (3200 DPI, 7 buttons, weights): Very good for the price (one of the cheapest high end gaming grade mice). The button locations are good and so is the feel of the mouse. The default drivers that come with the mouse don't work with games well. You'll have to download the newer ones from their web site and do some special settings for your games to register the side buttons as MOUSE4 and MOUSE5. Highly recommended (drivers could use some work though).

Ideazon Reaper Edge Gaming Mouse - 3200 DPI (3200 DPI, 6 buttons): It's a decent mouse except for the side buttons. The bottom side button is under a nub that is a bit annoying to reach in the middle of a first person shooter fight. The top side button is a little nicer to reach and decent to use for knocking zombies off yourself in L4D. The wheel is annoying since sometimes as you scroll it seems to click without putting much pressure on it (which is annoying if you have something bound to MOUSE3 and you just wanted to scroll the mouse wheel). Also, it would have been nice to have two DPI buttons instead of the one (easier to "go to sniper mode"/"go to regular mode"). Currently the DPI button toggles between 5 different DPI levels one at a time and there isn't a way just to use less than that (I'd prefer just two for the above scenario...). I wouldn't recommend this mouse in it's current form.

As with any mousing, be sure to have a good quality mouse pad that doesn't need to be replaced (I used to replace those 3M Precise mouse pads about every month heh). I've been using a fUnc sUrface 1030, but there are a lot of newer ones out there now. Just be sure it's something you can soap wash and you should be good to go (no foamy or cloth pads).

Great gaming product. REMOVE PLASTIC FILM FROM THE BOTTOM AND UPDATE YOUR DRIVERS BEFORE JUDGING!
All I can say is this is another great Razer product. It did indeed come right out of the box with all the problems people described in other reviews. I installed the provided disk drivers and restarted as per instructions. My computer restarted and the mouse went dead. I had to unplug and replug to get it to power up. The mouse powered up and mouse movement was extremely jumpy and wouldnt move correctly. Reading reviews and looking around before I purchased the mouse I had a memory jog and was reminded to take the clear plastic off the bottom. PROBLEM SOLVED. I played around with the mouse and found that it would lag a second or two before moving after sitting for a couple seconds. Another quick trip to the review pages and found that this is an easy remedy. DOWNLOAD THE UPDATED DRIVERS! That task completed and the mouse moves and works like a dream. In this day and age with software and hardware upgrades it should be all but instant to go to a website and download the latest driver. I wont insult anyone but if you expect any computer part or product to work right out of the box without updated drivers you're more than likely sorely mistaken.

I use this mouse with a steelseries mousepad and they are a great together. I personally love the look and feel ot Razer mice and they are a great fit for my hand and wrist posture. I havent played with any of the marco capabilities or anything like that but if it holds true to with other Razer products I wont be disappointed.

The only true recommendation I would offer someone that cant be fixed with a trip to the net is a trip to a local best buy or similiar store to see how the fit and feel to your hand will be. If you like what you see and feel hands on you wont be disappointed once you start using it.

Like mentioned above, dont let some of the down reviews deter you from this mouse. Take the plastic shipping sheet off the bottom and install the updated drivers and you wont be disappointed.

As far as usage I use this mouse for everything. WOW, COD4, BF2, Dawn of War II, are all on my active gaming list I've used this mouse with as well as a little Corel and photoshop'ing. Its meets my expectations and more.