This Is The Bluetooth Version Keyboard:https://sg.xiapibuy.com/product/266354703/5946442861/If You Want More Optical Switches, Click This Link to See:https://sg.xiapibuy.com/product/266354703/4038564413/The following is a description about the keyboard you are browsingDescription:Features:100% brand new and high quality.61 keys with poker standard layoutOver 100 million times keystroke life, 2 times longer than the traditional mechanical switchesABS case, double-color ABS key cap, classic and fashion.Waterproof( IP68 waterproof grade) / dustproof / anticorrosion.3-layer programmable download mode (RGB version).Wonderful shining backlight, 16 million color RGB lighting effects to meet the demands of gamersCustomize your keyboard's backlighting through the software Ergonomic gaming keyboard design to offer the most comfortable gaming experence. Drive AP:1. DIY light effect2. Powerful game macros3. There are hundreds of light effects available for download (continuous update)4. Full-key programmableSpecifications: Model: SK61 , SK61SItem Type: USB Wired Keyboard, Wired + Bluetooth 5.0 KeyboardMaterial: ABSColor: Black Axis Body Type: LC / Gateron (Optional)Backlight Type: RGB Light Keys: 61 keysConnection: Wired Interface: USB 3.1 Type C USB-C Cable Length (m): 1.5m/4.921ft (Approx.) Keyboard Lifespan (times): more than 100 million Bluetooth Version: Not Supported Power Supply: USB Port Suitable for: PCWaterproof level: IP68Quantity: 1 Set (other accessories demo in the picture is not included)Note: 1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:1 Set X Wired Mechanical Keyboard (No retail package)