️ BT21BABYWIRELESSSILENTMOUSE : BT21 and Royche Collaboration Wireless Sil...️ BT21 BABY WIRELESS SILENT MOUSE : BT21 and Royche Collaboration Wireless Silent Mouse BATTERY : Uses One AA battery SILENT CLICK : Noise is not occer even when used in a quiet place. LONG WIRELESS RANGE : 20m, 66ft SIZE : 113 x 64 x 31 mm, 4.4 x...more