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: ABS Bluetooth version: Bluetooth 4.0 Effective distance: 10-15 m Battery capacity: 250mAh Charging time: 1-2h Frequency: 2.4Hz-2.4835GHz Function: Video likes, taking photos, turning e-book, etc Support system: IOS, Android NOTE: Support 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: Settings-Accessibility-Touch-Assistive Touch-Open In 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 Control 1 x Cable