Features: Adopt high performance BT chip to provide fast response speed and stable signal transmission, the stable transmission distance up to 10m without delay. The keyboard adopts the simple chocolate square key cap, good springback, brushed design, scissor button structure brings comfortable operation and feeling. Ultra-thin and lightweight design, portable to carry and use. Touch pad design, supports a variety of gesture operations, more convenient to use. Low noise, avoiding disturbing others. Built-in rechargeable lithium battery, low power consumption, long service life. Compatible with Android, iOS and Windows systems. It can be used for tablet, smartphone, laptop, etc. Specification: Color: Black Material: ABS Number of keys: 59 BT version: V3.0 Transmission range: Within 10m Working voltage: 3.1-4.2V Key life: 3 million strokes Battery capacity: 230mAh Supported system: Android 3.0 and above, Windows XP/7/8 and above Item size: 20.1 * 12.7 * 0.6cm /7.91 * 5 * 0.24in Item weight: Approx. 130g /4.59oz Packing list: 1 * Keyboard 1 * Charging cable 1 * User manual