English/Arabic Layout of the Lenovo Professional Slim II Wireless and Bluetooth Rechargeable Keyboard in Grey: Brand Lenovo OSOS Independent Support Power Needed KB⁚420 mAh lithium. USB A to C Cable Length/Type 1 M Battery Life Up to 3 months It takes two hours to fully charge a battery. Hot Keys F1–F12, P1–P4 Extra/Special Features Keys that can be programmed, a lithium battery, and a smooth switch up to three degrees