A4TECH 3000N V-TRACK 2.4G Wireless BANGLA Keyboard (KAT503) earbuds and 24/7 tracking for heart

and 24/7 tracking for heart rate

the B21 is compatible with various operating systems

and there are 16 selectable hotkey commands

providing a reliable companion for years to come

A4TECH 3000N V-TRACK 2.4G Wireless BANGLA Keyboard (KAT503) earbuds and 24/7 tracking for heartSpecification Keyboard Layout Full sized keyboard Keys Standard keys with 12 Fn multimedia hotkeys. Connectivity 2. 4GHz wireless (via nano receiver) Interface USB Dimension(LxWxH) 454 153 30 mm Weight 559g (with battery) Additional Features Adjustable feet for typing comfort Mouse Sensor V TRACK optical sensor (Infrared) Resolution 1000 DPI (high precision) Polling Rate 125Hz Buttons 3 (Left, Right, Scroll Click) Interface USB 2. 0 Connectivity 2.