1. The product is a Bluetooth remote self-timer for mobile phones, which can be used immediately without any software installation. It is applicable to all brands of mobile phones with IOS, Android 4.1 or above. Wide compatibility and stable performance 2.Built-in button battery with a capacity of 200mah can take 5000-8000 photos 3. Self-timer can be taken from a long distance, and it can reach 10 meters away without obstruction. 4. With 5 function keys: switch on / off, Bluetooth pairing, video shooting. Take photos, Android configuration, IOS configuration. 5.Various colors available It is applicable to all brands of mobile phones with IOS, Android 4.1 or above Built-in button battery with a capacity of 200mah With 5 function keys