Mechanical Keyboard, UtechSmart Mercury LED Backlit Full Size 2.4 GHz Wireless/USB Wired Dual Mechanical Keyboard with Rechargeable Battery [Upgraded Version] Professional wireless & wired Keyboard: powerful 2.4GHz wireless connection with one tiny receiver that stays in computer. Limitless method for gaming and typing within 30 feet/ 10 meters in clear sight. Support both wireless and wired modes. Compatible with Win10/ Win10.1/Win8/ Win7/ Win XP/ Vista/ Linux and later OS. Rechargeable batteries: Rechargeable keyboard with two high capacity 2, 000mAh batteries 4, 000mAh) lasts for 40 hours under fully charged ( 5 x 8 hours). when the keyboard runs out of power, the backlight will Flicker. With a 1.8M detachable Micro USB charging cable, It will not interrupt your gaming or typing. The indicator light will turn off when Fullly charged. High End gaming-grade keycaps: 104 key gaming circuitry with 12 keys dedicated multimedia controls. Anti-ghosting full size keyboard Meets the need for both gaming and typing. Blue switch keyboard improves typing speed and accuracy, up to 50 million times keystroke test. It also owns the most rhythmic clicky feeling of typing among all kinds of switches. Bicolor mold keycaps prevent it from getting slippery or mushy. Advanced LIGHTING control: 5 levels adjustable Red illuminated LED keyboard deliver dynamic, vibrant backlighting. Customize light breathing or permanent lighting mode; turn on/ off the light; turn off all LED lights, except "WASD" Keys and     keys. High advanced details: metal and ABS Construction; gold-plated USB connector; anti-slip rubber pad; Adjustable bracket with rubber base; dustproof keyboard with 3 waterproof drain holes; wearproof braided cable. Friendly customer service with 12-month refund & replacement warranty. Note: Please take wrapper off batteries before use.