Features: 【BLUETOOTH COMPATIBLE】Bluetooth compatible, stable connection, low power consumption. Bluetooth compatible wireless distance is about 5m/0-1181.1inch, allowing larger range to use. 【TWO-WAY FINDER】It is compatible with various mobile phones, one mobile phone can bind 6 devices, and can be online at the same time. Intelligent two-way anti-lost, the mobile phone can find the tracker, and the tracker can also find the mobile phone. 【LOCATION RECORD】It can record the location, click the call button, quickly find keys, wallets, pets, etc., support indoor range about 0-20m, outdoor range about 30-50m, volume reminder 60dB. 【BATTERY POWERED】Built-in 1 x button battery, low power consumption and stable connection, the tracker finder can stand by for 3-6 months. You can replace the battery. 【HANGING KEYCHAIN】Tracker is (L x W x H) about 30 x 30 x 9mm/1.18 x 1.18 x 0.35inch, and designed with a keychain, which is easy to hang on backpacks and pet collars, and is not easy to fall off. Specifications: Color: black, white Material: ABS Power by: Built-in 1 x button battery Connection: Bluetooth compatible Wireless distance: about 50m Size: (L x W x H)about 30 x 30 x 9mm/1.18 x 1.18 x 0.35inch Package Includes: 1pc x Tracker finder 1pc x User manual Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.