Frequency: Bluetooth
<br />light source: Red laser
<br />keyboard size: 100*240mm
<br />Projection surface: Non reflective,and opaque surface
<br />Operating surface: Any solid plane
<br />Battery capacity: 600mAh,3.7V
<br />Battery charging time: 90 minutes
<br />frequency range: 2402-2480MHz
<br />Modulation format: GFSK
<br />Keyboard layout: 19mm,tilt,QWERT
<br />Keyboard distance: 80mm to set
<br />Recognition rate: 350 words / min
<br />Charging power supply: USB
<br />Battery usage time: 150 minutes
<br />Bluetooth: HID, Profile Ver V3.0 1
<br />Channel: 79
<br />Compatible:Windows XP / VISTA /7/8/WINDOWS PHONE 7;ios 4/5/6;android 3.1 and above;MC OS  X;Package: Yes
<br />Size: 78*40*20mm
<br />Color£ºBlack