Features: 1. Connected to the wireless function of the mobile phone, the two-way search function can connect 3 trackers at the same time. 2. In the connected state, when the tracker exceeds the effective distance range, the mobile phone and the tracker report simultaneously. 3. On the phone, you can view the map location when the tracker is disconnected. 4. Provides the DND function, which can be set to mute during a certain period to prevent work and other important time from disturbing. 5. The phone shooting function by the tracker, remote self-timer. Description: The tracker can be connected to the wireless function of the mobile phone, the two-way search function can connect 3 trackers at the same time. Specifications: Battery capacity: 220mah (battery included) Interface: wireless 4.0 Applicable objects: pets, wallets, elderly, children Wearing method: hanging buckle Wireless distance: 25-30 meters Additional functions: selfie, recording, positioning Size: 38*38*7MM Material: ABS Package Included: 1 pc * tracker 1 pc * battery 1 pc * manual 1 pc * box