Features Versatile Functionality: The controller is not only functional for electronic music scores but also adaptable for navigating e-books, PowerPoint slides, image galleries, and page-turning within short video applications, offering a seamless reading and browsing experience. Extensive Compatibility: This controller boasts broad support for an array of operating systems, including And roid, iOS, Har mony, and Win dows, making it a highly adaptable accessory for numerous devices. Effortless Blue-tooth Connectivity: Equipped with the latest Blue-tooth 5.3 technology, the controller provides a more responsive and straightforward control interface, enhancing the user's overall experience. Impressive Battery Endurance: The controller houses an internally rechargeable lithium battery, boasting an extraordinary lifespan that allows up to 73 hours of continuous use on a single charging, ensuring reliability and convenience. Robust Construction: Crafted from high-quality ABS material, the controller's casing is designed to withstand impacts and resist wear, guaranteeing longevity and durability even under frequent use. Description: This multifunctional controller is suitable for controlling electronic music scores, navigating e-books, PowerPoint slides, and other applications like image galleries and short videos. It offers wide compatibility with systems like And roid, iOS, Har mony, and Win dows, and features effortless pairing with devices through Blue-tooth 5.3 technology. It has a long-lasting rechargeable battery with up to 73 hours of use on a single charging and is built from durable ABS material for enhanced longevity. Specification: Item Type: Blue-tooth Multimedia Controller Material: ABS Battery: 1 x rechargeable lithium battery, battery capacity: 230mAh (built in battery) Blue-tooth Version: Blue-tooth 5.3 Endurance: 73 hours of continuous use Package List:1 x Blue-tooth Multimedia Controller 1 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). Package List 1 x Bluetooth Multimedia Controller 1 x Charging Cable 1 x Manual