The Mamba Elite 2015 by Razer uses a Laser sensor, specifically the 4G Dual Sensor ( laser and optical), providing a DPI/CPI range of 6400dpi max. This results in a tracking speed of 200ips, and a maximum acceleration of 50g. It uses a Dual mode wired /wireless connection. It weighs in at 135g grams with the cable and is approximately 128 x 68 x 43mm (LxWxH).
As Razer is the pioneer of the world's first gaming-grade wireless tech, you can be assured the Razer Mamba performs as well cordless as it does corded. With 1ms response rate, your command is executed first even if you and your opponent react at exactly the same time.
When the battery depletes in the Razer Mamba, just plug in the USB cable so you can keep gaming while it recharges, for zero downtime. Or when not in use, pop the Razer Mamba on the charging dock that doubles up as the unit's wireless receiver.