1、35 Keys: Numeric keypad has 35 keys, compact structure, will not take up too much space, easy to carry and use when going out. 2、Connection Method: Numeric pads have two connection modes, BT and wireless, three computers can be connected at the same time. 3、Long Battery Life: The BT number pad has a built in 300mAh rechargeable polymer battery, which can last for 20 hours. 4、Ultra Thin Design: The wireless numeric keypad adopts an ultra thin design and supports both for OS X and for Windows systems. 5、Metal Shell: The 35 keys numeric pads features a sandblasted aluminum alloy case, which is elegant and durable, 1 x Wireless Numeric Keypad1 x Receiver1 x Charging Cable1 x User Manual Item Type: Wireless Numeric KeypadMaterial: ABS, MetalProduct Size:Approx. 146 x 113 x 11mm / 5.7 x 4.4 x 0.4inBT Version: V 5.0Working Distance: 10mConnection Method: BT, 2.4G WirelessCharging Interface: Type CNumber of Keys: 35 KeysBattery Type: 300mah Li ion Battery (built in)