1. Operating distance: 10 meters wireless connection
2. Interface: Bluetooth
3. Silent effect: good
4. Button life: 5 million times
5. Duration: 100 hours
6. Lithium battery life: 3 years
7. Current: 500mA
8. With pen slot design, easy to use
9. All-round protection, shock-proof and drop-proof, wear-resistant and durable