Specifications:
<br />Color: Black / Pink (optional)
<br />Material: ABS
<br />Bluetooth version: 3.0
<br />Bluetooth distance: 10 meters
<br />Battery: built-in 200mAh lithium battery (included)
<br />Charging time: 4 hours
<br />Use time: 100 hours
<br />Charging voltage: DC 5V
<br />Number of keypads: 68 keys
<br />Applicable models: for Microsoft Surface Pro 3 / pro 4
<br />Product Size: 24.1 * 17.5 * 2 cm
<br />
<br />Packing list: 
<br />1 x Wireless Bluetooth Keyboard (built-in lithium battery) 
<br />1 x Chinese and English manual 
<br />1 x USB charging cable