Feature: 1. Multi Functions: The controller is functional, can be used for electronic music score, electric book, PPT, picture page turning, can also be used for short video APP reading and turning. 2. Wide Compatibility: The controller supports for Android, for IOS, for Harmony, for Windows and other operating systems. 3. Bluetooth Connection: The controller is equipped with Bluetooth 5.3, which makes the control more convenient. 4. Long Battery Life: Built in rechargeable lithium battery, with super long life, can be used continuously for 73 hours when fully charged. 5. High Strength: The shell is made of excellent ABS material, which is resistant to falling and abrasion, ensures long term service. Specification: Item Type: Bluetooth Multimedia Controller Material: ABS Battery: 1 x rechargeable lithium battery, battery capacity: 230mAh (built in battery) Bluetooth Version: Bluetooth 5.3 Endurance: 73 hours of continuous use. Package List: 1 x Bluetooth Multimedia Controller1 x Charging Cable1 x Manual Note: For IOS 13 and higher systems need to turn on the auxiliary touch function (Settings, Auxiliary Functions, Touch, Auxiliary Touch, On).