FOM Ultra-thin Wireless Bluetooth 2.0 Slide-out and standing Back Light Keyboard for iPhone4/4S - Red Ship from USA Wireless Bluetooth keypad for iPhone 4G 4S, Pairs up with iPhone 4G 4S directly, Aims to solve the problems of touch screen typing Ultra-thin and slide-out design, convenient for taking, Ready to use all the time with the slide-out design, Simply slide the keypad backward when talking the phone, Fits your iPhone perfectly with all easy access Built-in rechargeable Li-ion battery for hours of typing, Color LED for working status indication, Bluetooth 2.0 version class 2, , With on/ off switch, Power: Charges by USB, A micro-USB to USB charging cable included Range of frequency: 2.4GHz Spectrum, Operating voltage: 3.7Vdc (powered by Li-ion), Standby current: 1.2mA, Operating current: &lt; 5mASleep current: &lt; 0.7mA Folded size (L x W x T): 135 x 85 x 35 mm, Net Weight: 6.8oz, Color: White, Compatible with:Apple iPhone 4/4S, Note:Accessory ONLY, iPhone 4/4S not included!