DESCRIPTION FANTECH W189 Wireless Mouse Sensor technology: Optical Sensor Resolution: 1200dpi Batery Life: 6 months Battery type: 1AAA Button qty: 3 Wireless Distance: max 10meter Wireless System: 2.4GHZ Interface: USB Receiver Weight 0.5 kg Dimensions 11.5 × 8.5 × 19 cm FANTECH W189 WIRELESS