Description: This Bluetooth Wireless Virtual Keyboard is a laser projection keyboard compatible with your desktop, laptop, smartphone, or tablet. It projects a red keyboard on any flat surface for fast and accurate data input. Built-in rechargeable battery, Mouse mode supported. Connects by Bluetooth or USB cable (included). Compact and portable for mobility and convenience. Fast and accurate data input and English QWERTY keyboard layout. Detection rate over 350 characters per minute and low power consumption. The laser keyboard is connected via Bluetooth HID or USB HID. Compatible with Windows, iOS, Android. Latest sensor module recognizes the location and movement of your fingers. With audio broadcast function, more convenient for typing. Press FN + K on the keyboard to start the voice broadcast. Specification: Size: 38x18x75mm Recognition rate: 350 words/minute Operating surface: Any flat surface Working environment: 0 ~ 35°C / 90% RH Storage environment: -5 ~ 35°C / ~ 90% RH External power supply: USB 5V 1A Battery & Capacity: Lithium polymer rechargeable battery, 700mAh (MAX) @ 3.7V Battery operating time: 200 minutes Battery charging time: 120 minutes Package Includes: 1 Piece Laser Keyboard 1 Piece USB Cable 1 Piece User Manual Note: 1.Avoid direct sunlight for a long time. Keep the product away from heat source. 2.Please do not use this product on uneven and irregular surfaces with reflective and transparent surfaces.