Description: This product needs to be placed on a flat, clean, opaque, non-reflective interface. There is no obstacle within 5 cm of the circumference of the host computer and the projection keyboard. It will affect the clarity under high brightness and the sun or strong light. Most Bluetooth-enabled devices can be used, regardless of model, including mobile phones, tablets, laptops, desktops! This product supports: Android system, Apple IOS system, Windows system, MAC OS system, Windows Phone system Laser projection keyboard This is the Bluetooth name of the device Model M1 (white color one) : Weight: 125g Product Size: 9cm * 4.3cm * 4.3cm Projection Size : 10cm * 25cm Connection With Smartphone: Use Bluetooth Function Connection With PC or Tablet : Use USB cable or Bluetooth adapter all can do it Battery Capacity: 2500mAh (MAX) ,3.7V Duration : About 6 hours Functions: Projected Keyboard , Mouse Gesture(IOS systems can't use this function), Supports bracket and mobile power bank supply