RYRA Rechargeable Backlit bluetooth keyboard for Laptop PC phone Windows Macbook tablet computer magnetic Wireless Keyboard Description: Interface Standard: Bluetooth-compatible 3.0 Charging duration:40 hours Operating voltage: 3.0~4.2V Operating temperature:-10~55 degrees Operating current: 100 days Specifications: Take it with you at any time. Slim appearance and lightweight volume Thinner than flat! Can be easily put into the computer bag, easy to carry. Simple appearance design, office entertainment two-in-one External Bluetooth-compatible keyboard, mouse, easy to improve operating efficiency Address the need for office communication/learning chat Intelligent keyboard multi-function keys, cutting songs/tone/brightness adjustment can be freely switched Built-in rechargeable battery no longer need to change the battery Built-in rechargeable battery, bid farewell to computer troubles, no need to replace the battery repeatedly, environmental protection and better use Package Included: 1 * keyboard, 1 * charging cable