Specification: Item Type: Red Switch Typewriter Mechanical Keyboard Material: ABS, PBT Model: For B705 Battery Type: Built in 1500mAh Li Ion Battery (Included) Bluetooth Version: BT5.1 Effective Distance: Approx. 10meter / 32.8ft Key Position: 100 Keys Switch: Red Switch Recesses Length: Approx. 35cm / 13.8in, Can Be Placed on Tablet and Phone at the Same Time Connected Devices: Smartphones, Tablets, Laptops, Desktop Computers Can Be Connected at the Same Time Compatible System: Compatible for Windows, for Android or for IOS How to Use: Turn on the Bluetooth connection can be, specific reference to the detailed instructionsLighting effect shortcut keys.Fn+Del: change the backlight modeFn+Ctrl: change the backlight colorFn+Back: Backlight on/offFn+F5: backlight brightness -Fn+F6: backlight brightness +Fn+PgUp: Light effect decelerationFn+PgDn: Lighting effect accelerationBluetooth shortcuts.Fn+Q: for Android modeFn+W:for Windows modeFn+E: for iOS modeFn+C: Press and hold for 3 seconds to reset all Bluetooth settingsFn+K: Press and hold for 3 seconds to reconnect a new Bluetooth device Package List: 1 x Keyboard (Ship with Inbuilt Battery) 2 x Replacement Keycaps 1 x Data Cable 1 x Key Puller 1 x Screwdriver 1 x User ManualWith Keypad: 100 key full size keyboard with keypad, all keys conflict free, built in tablet and phone stand, approximately 35cm long, ergonomic keyboard includes 3 levels adjustable stand to reduce the strain on your wrists from typing at a higher angle. Hot Swappable: Mechanical keys offer medium resistance, audible click and tactile feedback for a comfortable and satisfying typing experience, you can also change every switch on this hot swappable keyboard without soldering. Dual Connection Modes: Bluetooth 5.1 and wired USB, with powerful Bluetooth 5.1 technology, you can connect up to 3 Bluetooth devices and one wired device via the included USB AC cable. Multiple Backlighting Modes: The keyboard is equipped with double injection molded ABS keycaps, supports up to 20 LED backlighting modes, supports single color mode and RGB color mode, built in 1500mAh rechargeable battery. System Support: Typewriter keyboard supports for Windows, for OS X, for Android, for IOS, etc. It supports various devices including PC, laptop, tablet, smartphone, and can be switched between devices by turning the left knob. Turn the right knob to adjust the volume.