Virtual Wireless Bluetooth Portable Projection Keyboard For Smart Phone PC Table Features Ensure fit By entering your model number. Virtual projection keyboard: more stable and smarter; better enhance the buyers experience Multifunction: This keyboard is equipped with a mini Bluetooth speaker, supports voice reports and music playback You will not find such a high-quality wireless charger. Purchase as a close friend or family member to save together We use original rechargeable batteries, which are the safest rechargeable batteries we have found for you Keyboard layout: about 19MM tilt, QWERTY keyboard layout Keyboard size: 100mm(H)*240mm(W) Keyboard position: 100mm from the bottom of the emitter Projection surface: non-reflective, opaque surface Recognition rate: 350 characters/minute Operating surface: any flat surface Working environment: 0 ~ 35C / 90%RH Storage environment: -5 ~ 35C / ~90%RH Dimensions (mm): 38mm x 75mm x 18mm External power supply: USB power supply / 5V 1A Battery & Capacity: Lithium polymer rechargeable battery, 1000mAH(MAX) 3.7V Battery charging time: 120 minutes USB interface: USB 1.1 & 2.0, USB HID Ver. 1.0 Bluetooth: V3.0 (class 2), HID Profile Ver. 1.0 Frequency range: 2402-2480MHz Channel: 79 Modulation: GFSK Include 1x projection keyboard 1x data cable