This BT numeric keypad is portable. Ideal for business use. Aluminium pad andergonomic tilt design is durable and comfortable to use. Built-in batterykeeps a long-time use. It supports Windows,iOS,Android systems. Rechargeable Battery With built-in 110mAh rechargeable battery, the keyboard has 2 months standbytime. Lightweight and Portable Using space aluminium material, the numeric keyboard is more lightweight anddurable. You can put it into your bag and carry it for business trip. X-Scissors Design Being dustproof and anti-fingerprint, the BT keyboard keeps decent all thetime. It is mute and comfortable to type. 3-5 millions times strikes ensure longer use. BT3.0 Connection It is easily connected with Mac or laptop via BT 3.0. stable and fasterconnection is guaranteed. Wide Compatibility Widely compatible with BT-enabled OS, such as Windows, Android system laptop,PC, tablet, iPad and Macbook. Specification: Material: Aluminium alloy #43; ABS Supported system: Windows,iOS,Android Key numbers: 34 keys BT: BCM20730 BT version: BT3.0 Key stroke: 5 millions Response time: 5 millisecond BT transmission distance: 10m/33ft Current: 2mA/3.7V Battery: Built-in lithium battery Battery capacity: 110mAh Charging time: 2 hrs Using time: 50 hrs Standby time: #xff1e;2 months Color: Black/Silver Item size: 14.6 * 11.4 * 0.9cm / 5.75 * 4.49 * 0.35in(L * W * H) Item weight: Approx.126g / 4.44oz Package size: 15.3 * 11.95 * 2.85cm / 6.02 * 4.70 * 1012in(L * W * H) Package weight: 213g / 7.51oz Package list: 1 * Wireless Numeric Keyboard 1 * USB Charging Cable 1 * User manual (English,Japan,Germany,French,Spanish,Italy)