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. 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 Colour:black Material:plastic Package Contents: 1 x Remote control page turner Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.