Keyboard size: 389.7 x 106.4 x 6.6 mm (open)150 x 106.4 x 13.2 mm (folding) Touchpad size:44 x 55 mm Weight: 183.5 g Working distance: 10 m Lithium battery capacity: 140 mAh Working voltage: 3.3-4.2 V Charger specifications: 5V=-- 1A or 2A Key working current: <3 mAStandby current:<0.1 mA Sleep current: 22 pA Sleep time: 10 minutes Awaken way : Press key Multi-connected with different devices