Main Features:�� Brand new and in high quality with a whole piece of aluminum alloy back cover�� Anti-skid for brushed metal texturing keyboard panel， easy to control�� Portable， ultra slim and very convenient for carrying it to travel or go on a business trip�� Light weight， quiet keystrokes， water-proof， dust-proof�� Can be used with smart phone， tablet PC， notebook， and desktop computer�� Use bluetooth module 3.0， with stable quality�� Built-in rechargeable lithium ion battery provides up to 40 hours of effective usage time， auto-sleep technology saves power and ensures extra long�� Micro interface， easy to charge�� Lithium battery Life: 3 years， key life up to 5 million strokes， standby time up to 60 days Type: Keyboard Features: Mini，Slim Material: Metal Color: Blue，Purple，Red，Yellow System support: Android，IOS，Linux，Windows，Windows Vista，Windows XP Interface: Wireless Connection: Micro USB Operating voltage: 3 - 5V Charging time: 4 hours Charging current: 100mA Standby time: 60 days Working Time: 40 hours Standby Current : 0.3 - 0.5 mA Sleep Current: Less than 25UA Power Supply: Li-ion Battery Battery Type: Li-ion Battery Lithium Battery Capacity: 120mA Package weight: 0.146 kg Product size (L x W x H): 20.00 x 12.50 x 0.50 cm / 7.87 x 4.92 x 0.20 inches Package size (L x W x H): 21.00 x 13.50 x 1.50 cm / 8.27 x 5.31 x 0.59 inches Package Contents: 1 x Mini Bluetooth Keyboard， 1 x USB Cable