How This Product Works:
This product emits infrared light from the lower end of the product to detect objects such as fingers. When an object passes through the are illuminated by the infrared light source, any infrared light reflecting off an object is detected by the sensor.
Information on the position and movement of the object is then analyzed to perform the product’s role as a keyboard.
 
Note:
Because this product uses infrared rays, strong infrared radiation from direct or reflected sunlight or from tungsten(halogen or incandescent) lighting may cause operating error

Caution:
Although this equipment is classified as Class 2  laser product, for your safety, do not directly expose your eyes to pattern projection beams orinfrared rays.
1. For safety reasons, be sure to use only the microUSB  to USB cable specified for this product.
2. Make sure to fully charge the battery before using the product for the first time.
3. Battery charging times may vary slightly depending on the ambient temperature.
4. The battery may not be charged to 100 percent of its rated cell capacity even when the charging indicate LED goes out.
5. Since the battery is a consumable item, its storage capacity decreases gradually as time passes.
6. Using or storing the battery in high temperature, humidity and pressure environments may cause the battery to explode

Bluetooth Connection Instruction:
1. Power on Projection Keyboard
2. Left blue LED will be blinking indicating the Projection Keyboard is searching for a new device or  previously paired devices within its proximity . Projection Keyboard will automatically attempt to re-connect to the recently connected devices
3. On primary device,go to Bluetooth setting;search for Bluetooth devices.
4. When the device discovers “Laser projection keyboard”,tap to connect.
5. Upon successful pairing, the LED will stop blinking and go out.