feature: Light weight, small size, easy to carry. The remote control is made of ABS material, which is fireproof and durable. Bluetooth 4.0, audio and video synchronization, stable transmission. The built-in lithium battery is rechargeable and reusable. Multi-function buttons make operation more convenient. The hole design is convenient and practical. The remote control is used to enjoy videos, take pictures, convert e-books, etc. Specification: Material: ABS Bluetooth version: Bluetooth 4.0 Effective distance: 10-15m Battery capacity: 250mAh Charging time: 1-2h Frequency: 2.4hz-2.4835ghz Functions: Like video, take photos, flip through e-books, etc. Support system: ios, Android notes: Support the new system of Apple 13.4 and above (the new system of Android is also supported), and the new system of ios 15 and above, press this setting: Open Settings---Accessibility---Touch---Assistive Touch Tracking sensitivity is adjusted to 50%. Please open Apple's Assistive Touch feature. Operation: Settings - Accessibility - Touch - Enable Assistive Touch In order to adapt to different mobile phone camera modes, the following camera keys can be moved according to the actual situation. The package includes: 1 x Bluetooth Compatible Remote Control 1 cable