Features: Brand new and high quality Press power button, LED flashing. After power on, press the bluetooth-compatible pairing key, LED flash slowly. The bluetooth-compatible step to a state that can be searched and match. Use the mobile phones to match. LED will be out after the success of the pairing. Long press the corresponding configuration key. LED will light up after configuration. The product can be used normally at-this-time. Without using for five minutes, the product will automatically enter a dormant state. Please press power button to turn off the timer when not in use, to ensure that the battery can be used for long-time. Can be charge with PC devices or mobile power adapter. LED on --- charging. LED out --- saturation. Specifications: Material:ABS Color: Black Size:Approx.4.9x3x0.9cm/1.93x1.18x0.35inches Package Includes: 1x Remote Shutter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.