Specifications: Item Type: Bluetooth Anti-lost Tracker Optional Colors: White, Black Battery: CR2032 (Not Included) Frequency Range: 2.402 ~ 2.480GHz Receving Sensitivity: -94dBm Voltage: 2.7 ~ 3.2V Operating Environment: -20°C ~ 70°C Bluetooth Version: Bluetooth 4.0 Low Energy Support for IOS and Android systems: IOS7.0 or above; Android 4.4 or above; Models need to support bluetooth 4.0 standard Support Bluetooth Low Energy(BLE), support two-way alarm Working Distance: Within 25 meters (no obstacle) Scope: Cellphones, Wallets, Cars, Children, Pets And Other Ancillary Objects Item Size: Approx.3.8 * 3.8 * 0.5cm / 1.5 * 1.5 * 0.2inch Package Weight: Approx.9g Package List: 1 x Bluetooth Anti-lost Tracker 1 x Manual Prevent the Loss of Goods: Bluetooth tracker item locator can be connected to items that are easily lost by the user (such as keys, handbags, etc.) and can be set through the dedicated APP software on the mobile terminal to prevent the loss of goods. Bluetooth 4.0: The anti-lost bluetooth tracker is based on the latest bluetooth 4.0, which is a low-power consumption product. It is powered by CR2032 battery and can stand by for more than 2-3 months and is easy to replace. Connected Bluetooth Function: Bluetooth findercan be connected to the Bluetooth function of the mobile phone, and the two-way search function can connect multiple anti-lost devices at the same time; in the connected state, when the anti-lost device exceeds the set Bluetooth range, the mobile phone and the anti-lost device will automatically alarm at the same time. Check the Location: The anti-lost Bluetooth tracker can check the location of the map when the device is disconnected. Control the shooting function of the mobile phone through the anti-lost device to realize remote Selfie. Not Disturb Function: Bluetooth tracker can also have a do not disturb function, which can be set to be silent for a period of time to prevent interference with work and other important times. It can support IOS7.0 or above and Android 4.4 or above, and the model must support Bluetooth 4.0.