1.[Tri-Mode Connection] - Powerful 3-mode connection supports Wireless 2.4GHz/Bluetooth 5.0/USB-C Wired. You can connect up to 3 bluetooth devices, 1 wireless 2.4GHz device and 1 wired device. Connect and switch devices easily with Fn+1/2/3/4/5. Compatible with Win, MacOS, iOS and Android systems. Switch the system by pressing Fn+Q/W/E/R according to the connected device. Support PC, Mac, smartphone, ipad and tablet. 2.[Retro Typewriter Style with Mechanical Keys] - Vintage steampunk round keycaps with silver rings make this keyboard look like a classical typewriter. The green switches feature a tactile bump and distinctive click sound along with optimized actuation and reset points for in class gaming and typing performance. Combining an aesthetic retro look with advanced technology, this keyboard will give you a unique typing experience. 3.[Hot Swap Switches & NKRO] - Sleeve hotswap allows for quick switch swaps without removing the keyboard and without soldering. Have fun and customize your unique mechanical keyboard to red switches/blue switches/brown switches/black switches as you like. All 84 keys are anti-ghosting, that is, all keys are non-conflict. Every keystroke is registered during intense gameplay and fast typing, no matter how many other keys are pressed at the same time. Let you enjoy high-grade games with fast response. 4.[Elegant Warm White LED Backlit & Long Standby] - This illuminated typewriter keyboard has 7 lighting effects. Press "Fn+" to change the lighting effects. The backlight can be turned off by pressing Fn+BackSpace. You can also adjust the backlight brightness and speed. The keyboard has a 3000mAh lithium battery, with low-power chip and energy-saving technology, it can last up to 20 days with the lights off. The keyboard goes to Shallow Sleep Mode in 2 mins of sitting idle to save battery, and Deep Sleep Mode in 15 mins.