1. Conform to Bluetooth 3.0+ standard; Including BQB, FCC, CE, ROHS and other relevant certifications; 2. The operating distance can be more than 10M. 3. Modulation mode: 2.4GHZ 4. Working voltage: 3.0 - 5V 5. Working current: Less than 4.0MA<br><br>Standby current: 20UA Sleep current : Less than 2 μ A Charging current: ≥ 100mA Standby time is more than 100 days Button force: 80 ± 10g The service life of keys can reach 5 million times Operating temperature: - 10 -+55 ℃ Style:Mini Interface Type:USB Operation Style:MEMBRANE Language:English Keyboard Standard:Mini Keyboard Colour:black Material:plastic<br><br>Package Contents: 1 x Bluetooth keyboard 1 x Leather case<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.