Cangjie Code Keyboard Traditional Chinese Annotated Wireless Keyboard 2.4G Wireless Connection Keyboard 1. Material: ABS 2. Key number: 78 keys 3. Interface: USB 4. Key technology: crater architecture 5. Connection: 2.4G USB wireless connection 6. System support: WINDOWSXPVISTA78 7. Transmission distance: about 10 meters 8. Power supply: 2 AAA batteries (not included) 9. Weight: about 300 g 10. Size: about 28.5 x 12.3 x 2.5 cm Features: 1. Ultra-thin keyboard, wireless connection, plug and play, with waterproof function 2. Advanced 2.4GHz wireless technology, transmission distance up to 10 meters 3. Anti-interference, no delay, no code loss 4. Transparent oil coating on the top of the characters to increase wear resistance 5. Multimedia shortcut buttons, you can play music, volume adjustment, and other functions for quick operation, saving time 6. Key feel comfortable, silicone elastic contacts, responsive, durable 7. Anti-tap keys are silent, the use of which will not affect others 8. Laser engraved key caps for characters, durable and comfortable 9. Intelligent matching, compatible with more devices