Feature: 1. MECHANICAL SENSE: Blue switch single handed keyboard 33 keys are conflict free keys, press the switch to make a loudly click sound, crisp paragraph feeling, strong mechanical sense, provide precise tactile feedback for gaming and typing. 2. RGB BACKLIGHT MODE: Customize a variety of lighting effects, static and dynamic can be selected to bring more fun to your game, FN+3 for brightness increase, FN+4 for brightness decrease, FN+5 for color switching, FN+TAB for lighting effect change. 3. ERGONOMIC DESIGN: Large palm rest provides better wrist support and ergonomic design, which can effectively reduce hand fatigue and provide you with an easy gaming experience. 4. 4 MACRO RECORDING KEYS: Press FN+G1/G2/G3/G4 for macro recording, first input what you need to record (FN+G1), the G1 light blinks; press FN+G1 again to finish recording, the G1 light returns to normal; G2 to G4 macro recording is the same as G1. 5. COMPATIBLE SYSTEM: USB direct connection, no driver required, plug and play, fully compatible for Win10/8/7/Vista/ME/XP, for Linux, for OS X, etc. Specification: Item Type: One Handed Gaming Keyboard Material: ABS Color: Black Interface: USB Light Effect: RGB Number of Keys: 33 Keys, Knob Switch: Gault Blue Switch. Package List: 1 x One Handed Keyboard1 x User Manual