Specifications:<br />Keyboard light source: Red laser diode<br />Keyboard layout: About 19 mm tilt， QWERTY layout<br />Keyboard size: 100 x 240 mm<br />Size:78x40x20mm<br />Projected keyboard location: 100 mm distancedevice<br />Required projection surface: Non-reflective， opaque flat surface<br />Detection rate: 350 Characters per minute<br />Operative surface: Any flat surface<br />Work environment: 0 ~ 35 Deg / 90 % RH<br />Save environment: -5 ~ 35 Deg / 90 % RH<br />External power source: USB power / less than 5V 1A<br />Power source: Built-in Li-polymer rechargeable battery<br />Battery capacity:Polymer rechargeable battery， 1000mAHMax@ 3.7V<br />Battery working time: 200 min<br />Battery charging: 120 min<br />USB interface:USB 1.1 and 2.0， USB HID Ver. 1.0<br />Bluetooth:V3.0 class 2， HID Profile Ver. 1.0<br />Frequency range: 2402 - 2480 MHz<br />Channel: 79<br />Modulation: GFSK<br />Compatible Software: Windows XP / Vista / 7 / 8， Windows Phone 7， IOS iPhone 4 / 5S / 5C and iPad， Android 3.1 and higher， MAC OS X<br />Not recommended for use in direct sunlight<br /><br />Features:<br />Compact ultra-portable for mobility.<br />English QWERTY keyboard layout.<br />Easy connection via Bluetooth 3.0 HID profile or USB.<br />Lithium-ion Polymer rechargeable battery， Mini-B Type charge interface.<br />Detection rate over 400 characters per minute and low power consumption.<br />Can be operated via USB cable on your laptop / PC.<br />Compatible with latest operating systems: Windows XP/ VISTA/7/8， wINDOWS pHONE 7， ios 4/5/6iPhone and iPad Android 3.1 higher， Mac OS X<br />Color:Black，Sliver，White<br /><br />Package Included:<br />1 x Laser Projection Keyboard<br />1 x USB Cable<br />1 x User Manual<br /><br />How this product works:<br />When the user presses a key on the projected， the infrared layer is interrupted. This produces IR reflections that are recognized by the sensor in three dimensions， Allowing the system to assign a coordinate.<br /> <br />Note:<br />Because this product uses infrared rays， strong infrared radiationdirect or reflected sunlight ortungsten halogen or incandescent lighting may cause operating error.<br /><br />Laser Keyboard Use:<br />FNB Clear the current Bluetooth pair and search status<br />Notes: Please restart the device after clearing the current Bluetooth search search status so that Bluetooth start new searching.<br />FNO Switch on/ off key stroke sound<br />Adjusting keyboard brightness:<br />FN  "∧ ": Increase the keyboard brightness<br />FN "∨" : Lower the keyboard brightness<br />Note: When users press every key on the projected keyboard， the device will make "beep" key stroke sound.