Feature: Ideal for typing emails, chat, and playing games. Pocket size, sleek and slim design. Extended battery life for hours of typing. Compatible with Bluetooth 3.0. 49 responsive, accurate standard QWERTY keys lay out. Built-in rechargeable Li-ion battery. Specification: Support mobile operating system: for Apple iPhone 4.0 version and later, for Windows Mobile 6.0 and later, for Nokia Symbian V3.0 and later Frequency band: 2.4 - 2.4835GHz unlicensed ISM band Receiving sensitivity: -75dbm (standard) RF output power: 4dbm maximum Bluetooth Version: 3.0 Standby: 400 hours Power: Charges by USB Charging time: 3-4 hours size: 114 x 58 x 6mm Material: Plastic colour: Black Package Contents: 1 x Wireless Keyboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.