Computer Accessory Sets features: MINI F3 Bluetooth Charging Treasure Laser Virtual Projection 2 in 1 Keyboard(Black) Color: we send based on the color or size of the main image of the product page. Quantitywe send based on quantity on title, if there is no quantity in the title, we send based on . Type:Virtual KeyboardApplication:LaptopKeyboard Standard:Laptop KeyboardOperation Style: CapacitiveInterface Type:Bluetoothspecification:1. Light source: red laser diode2. Keyboard layout: about 19MM tilt, QWERTY keyboard layout3. Keyboard size: 100mm (H) * 240mm (W)4. Keyboard position: 100mm from the bottom of the emitter5. Projection surface: no reflection, opaque surface6. Recognition rate: 350 words / minute7. Operation surface: any plane8. Working environment: -10 ~ 40 C / 90% RH9. Storage environment: -20 ~ 40 C / -90% RH10. Size (mm): 84mm 22.5mm 58mm11. Weight (g): 180g12. External power supply: USB power / below 5V1A13. Battery capacity: lithium polymer rechargeable battery 5200mAH (MAX) @ 3.7V14. Battery working time: 30 hours15. Battery charging time: 3 hours16. USB interface: USU1.12.0, USB HID Ver.1.017. Bluetooth: V3.0 (class2), HID Profile.1.018. Frequency range: 2402-2480MHz19. Channel: 7920. Modulation: GFSK