Wireless Laser Projection Bluetooth Name Specifications Light source Red laser diode Keyboard layout:About 19MM tilt, QWERTY keyboard layout Keyboard size:78mm*4mm*19mm Product size:38mm x 75mm x 18mm Battery working time:120 minutes Battery charging time:100 minutes Working environment:0 ~ 35°C / 90%RH Storage environment:5 ~ 35°C / ~90%RH Frequency range:2402-2480MHz Bluetooth:v3.0, HID Profile Ver.1.0 Recognition rate :350 words/minute Weight (g):47g Channel: 79 External power supply USB:power supply / less than 5V 1A Frequency Range:2402-2480MHZ Battery & Capacity Lithium polymer rechargeable battery:700mAH(MAX) @ 3.7V Working platform: non-reflective, opaque plane Projection surface Non-reflective, opaque surface -Connect via USB HID The laser bluetooth keyboard and the host device are connected by a USB data cable, and the host device must support USB HID (Note: Most Windows devices support USB HID.) Turn on the laser bluetooth keyboard. -After the LED indicator is correctly connected If the LED indicator is red, it means that the charging is in progress, and the red indicator of the LED stops, it means that the charging is completed, and the product can be used normally in the charging state. ***Tips: Built-in mouse capabilities for all non-iOS devices.(iOS can only be connected via Bluetooth)