Specifications：
Keyboard light source :Red laser diode
Keyboard layout :Approx.19mm incline， full-sized QWERTY layout
Projection size:240mm(W)*100mm(H)
Projected Keyboard location : Approx. 100mm from keyboard device
Required projection surface :Non-reflective， opaque flat surface
Detection rate :Over 350 characters per minute
Operation Surface :Any opaque flat surface
Working Temperature :Approx. -10~40°C/90%RH
Storage Temperature :Approx. -20~40°C°C/~90%RH
Physical Dimension :84mm*22.5mm*58mm
Weight :180g
Input DC Charging Power :Above 1.5A @ 5V-5.4V
External Power source :USB ports， 2A @ 5V
Battery capacity :Polymer rechargeable battery， 5200mAH(Max)@3.7V
Battery working time :30 hours
Battery charging time :3 hours
USB interface :USB 1.1 and 2.0. USB HID Ver. 1.0
Bluetooth :V3.0(class 2)， HID Profile Ver. 1.0

Features：
Built-in 5200mAh high capacity rechargeable battery can charge a typical smart phone and tablet PC for 3 times， LED battery Indicator displays the power availability.
Ultra-portability
Aluminum unibody finishing and styplish design persuade asthetic beauty

Package list:
Bluetooth Virtual Laser Projection Keyboard with 5200mAh Power Bank