Features:Light weight, small size, easy to carry.The remote control is made of ABS, which is fireproof and durable.Bluetooth 4.0, audio and video synchronization, stable transmission.Built-in lithium battery is rechargeable and reusable.Multi-function buttons make the operation more convenient.The lanyard hole design is convenient and practical.The remote control is used for video likes, taking photos, turning e-book, etc.Specifications:Material: ABSBluetooth version: Bluetooth 4.0Effective distance: 10-15 mBattery capacity: 250mAhCharging time: 1-2hFrequency: 2.4Hz-2.4835GHzFunction: Video likes, taking photos, turning e-book, etcSupport system: IOS, AndroidNOTESupport new Apple systems above 13.4 (supported by new Android systems at the same time), and new systems above IOS 15 press this setting: open settings---accessibility---touch---assisted touch-on-tracking sensitivity is adjusted to 50%. Please turn on the assistive touch function for Apple systems. Operation: SettingsAccessibilityTouchAssistive TouchOpenIn order to adapt to different mobile phone modes to take pictures, the following camera keys can be moved according to the actual situation.Package Included:1 x Bluetooth-compatible Remote Control1 x Cable