Features 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 Controller 1 x Charging Cable 1 x Manual