?Large Capacity Battery?GMK67 is equipped with 3000mAh battery for ultra long-lasting performance.The battery life is about 20 hours when the backlight is turned on in the Bluetooth mode, and the battery lasts about 20 day without backlight. The charging time is 5 hours and the standby time is 200 hours. And the wired mode will also charge the keyboard at the same time, which is really a cool feature and no more worries of battery shortage during working or trips. ?Scroll Knob for Easy Media Control?The GMK67 features a versatile rotary knob that works as a volume controller with any operating system. It can also be modded with other functions via the supported software. With one knob, this DIY kit indeed pulls up the experience of any possibilities to be more than a keyboard. ?Gasket Construction?A sponge pad and a sponge switch pad between the PCB and the gasket board to reduce key noise and offering a very satisfying typing experience.It feels very soft when used and helps to relieve hand fatigue. ?67 Keys Compact Keyboard?67 keys mini size, American layout design. A mini 65% size keyboard but also has the functionality of a full size keyboard while saving your desktop space.With the numerous FN+ key combinations you can achieve a variety of needs. Thanks to its 65% mini size and wireless design, you can take it anywhere. ?Hot-Swappable Design Can be DIY?GMK67 is a Hot-Swappable mechanical keyboard, fully Hot-Swappable 3-pin or 5-pin mechanical switches, you can DIY the different switch you want to experience on the keyboard and there is no need for any soldering. ?Triple Modes: Bluetooth 5.0/2.4GHz Wireless/Wired?Our keyboard supports 3 modes of Bluetooth5.0/2.4G/Type-c wired connection and 18 cool backlight effects to make your desktop very cool!Wireless mode, stable Bluetooth, worry-free Type-C wired mode, can be connected anytime, anywhere, very convenient. You only need a keyboard to connect multiple devices, without frequent switching.