3 Modes & Multiple Devices：S21 numpad supports BT 5.2, 2.4GHz, USB-A to C wired connection, capable of connecting up to multiple devices simultaneously and switching between them. Compatible systems include Windows , Android macOS ,iPadOS, iOSEasy to operate: Inmode, The mechanical numpad press and hold FN+1,or FN+2 or FN+3 to activate openchannel. Select differentchannels for different devicesHot Swappable Neptune Keyswitch：Bluetooth number pad adopts the Neptunefrom TTC,which is smoother,more stable and transparent.41gf trigger pressure,2.0mm quick trigger,suitable for office financial keyboard.Supports full key hot swappingNot just a keyboard：There are also 22 RGB lighting effects, adjustable with 5 levels of backlight brightness, and can also change according to music，Experience colourful lighting effects at every momentRechargeable 800mAh Battery：kawaiiis equipped with an 800mAhthat can be recharged for use.This numeric keypad can last for 7 days with lights on and 10 days without lights on5-sided Sublimation PBT Keycaps：The pink keycaps numpad are made using a 5-sided sublimation process, with bright and long-lasting colors, delicate and clear patterns, and will not fade. It has excellent oil resistance and wear resistance

• Default: 3 Modes & Multiple Devices：S21 numpad supports BT 5.2, 2.4GHz, USB-A to C wired connection, capable of connecting up to multiple devices simultaneously and switching between them. Compatible systems include Windows , Android macOS ,iPadOS, iOSEasy to operate: Inmode, The mechanical numpad press and hold FN+1,or FN+2 or FN+3 to activate openchannel.