Features: *With BT3.0 technology, this remote shutter has fast transferring speed and a transmission distance of 33ft. *It is compatible with smart phones which OS is Andriod4.2.2 or newer, iOS 6.0 or newer. *When it is connected to your smart phones successfully, you are free to take a picture or video by clicking the button without holding your phone. *With a LED light, the flickering frequency of it clearly shows the state of the connection. *Only weight 8 grams. Portable and lightweight design is enough for you to carry it around. Specifications: BT Version: BT3.0 Transmit Frequency: 2.4GHz-2.4835GHz Transmission Distance: 10m/33ft Battery: CR2032*1 Cell Battery Life: About 6 months under working in 10 times a day Item Size: Approx. 5.0*3.1*1.0cm/1.96*1.22*0.39in Item Weigh: 8g/0.28oz Package Size: 11.2*5.9*2.2cm/4.40*2.32*0.86in Package Weight: 17.5g/0.61oz Package List: 1* Remote Shutter 1* Button Cell 1* User Manual