Inca IWM-356L. Device interface: RF Wireless, Movement detection technology: Laser, Purpose: Office. Frequency band: 0.027 GHz, Wireless range: 1.5 m. Wireless receiver interface: USB, Receiver type: standard. Power source: Batteries, Battery type: AAA. Width: 102 mm, Depth: 57.5 mm, Height: 35.5 mm