Feature:1. Reliable 2.4G wireless transmission technology, wireless transmission at a distance of 10 meters.2. The micro USB receiver is plug‑and‑play and does not require any drivers.3. The built‑in receiver makes it easy to carry, and the simple storage bin makes it easy to store.4. The standard Micro USB data cable is connected to the keyboard port to automatically enter the fast charging mode.5. The body is made of ABS plastic and has been processed with fine matte texture.Specification:Item Type: Numeric KeypadColor: BlackQuantity: 19 keysWorking Method: WirelessWorking Voltage: 4.5V~5.5VInterface: USB receiverTransmission Distance: 10mErgonomics: SupportMaterial: ABSBattery: Built-In Lithium Battery ZY103040 36mah.Package List:1 x Keyboard1 x Manual1 x Data Line1 x For Bluetooth ReceiverNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.