... on sofa or bed..5.In-build , rechargeable lithium-ion battery with large durable-power, shorter charging time, ... low power loss optical Sensor9.Full-functional QWERTY mini-keyboard:Sophisticated, clever keyboard layout10.Classic iphone style :Shapely, stylish, elegant, ... DC 30mAInterface: USB1.1Size: 19 * 14 * 6.3mm Keyboard SpecificationsOperating voltage: 3.3VKey Current: 3.0mAMachine current: 8. ...