Specifications: Key layout: Original layout Key notation: English Number of keys: 67 Key pitch: about 18mm Keystroke durability: Approximately 3 million times Wireless method: Bluetooth Ver.3.0 Operating distance: About 10m Built-in battery: Lithium-ion battery 110mAh Charging interface: Micro USB Charging time: About 2 hours Continuous use time: About 40 hours Continuous standby time: About 100 days Compatible models: iPhone, iPad, Windows tablets, Android tablets/smartphones Supported OS: iOS6.0 or later, Windows8.1 or later, Android4.1 or later Material: ABS/PU Size: Folded = width 156 x depth 93 x height 14 mm, use = width 313 x depth 93 x height 7 mm What's in the box 1 x Bluetooth Kerboard 1 x User Manual 1 x USB Cable