Description: This tracker play and pair it to your phone via Bluetooth. Connect up to 8 Bluetooth trackers to the app. The tracker keeps in connection with your phone through the app, and you will be informed when they move out of effective distance range. Chain the tracker with anything you may lose, press "Alarm" on your mobile app to search the tracker within active distance. By remote control, can turn on the cell phone for self-portrait. Help you to find the lost keys and other easily lost novelties quickly, such as wallet, car, kid, pets, bag, suitcase or other belongings. Specification: Material: Plastic + Metal Size: Approx. 92x35x10mm/3.62x1.38x0.39inch Battery Model: Button Battery CR2032 Standby Time: 4-6 Months Working Distance: Max 14-16m/45.93-52.45ft Bluetooth Version: 4.0 Power supply: 1 x CR2032 Battery Package Includes: 1 x Tracker Key Chain 1 x CR2032 Battery 1 x Number card 1 x Manual(3 Pack) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.