SOLAKAKA SK90 Tri-mode 90 Keys Wireless Silicone Keyboard 1. Tri-mode Connection & Multi-device Compatibility: Supports 3 connection modes (3 Bluetooth 5.0 channels, 2.4GHz wireless, Type-C wired), compatible with multiple devices and systems, with easy switching. 2. 90-key Layout with Numpad: Retains the numeric keypad, balancing compactness and practicality for officedata input, saving desktop space. 3. Silent Membrane Switches & PBT Keycaps: Adopts silent membrane switches for low typing noise; paired with PBT keycaps, which are wear-resistant, oil-proof and comfortable to touch. 4. Dual Knob Multi-function Design: The left knob adjusts RGB brightness & switches lighting effects; the right knob controls volume & toggles mute with one press, enabling efficient operation. 5. 14 RGB Lighting Effects: Supports 14 backlight modes; the backlight can be turned onoff with the ONOFF key, or effects can be switched via Fn combination keys, offering a rich visual experience. 6. Ergonomic & Spill-Resistant Design: Slimmer keycaps and shorter switches fit natural hand positioning; spill-resistant structure protects against minor liquid spills, extending product lifespan. 7. Long-lasting Battery: Equipped with a 4000mAh large-capacity battery for long battery life, reducing charging frequency.