1、There is no need to download an APP, no traffic network, and one-click search. As long as there is for iOS equipment near the anti-lost device, the anti-lost device can maintain its positioning state. 2、When items are within the range, you can use the APP \u0027Find\u0027, click the Play Sound button, the device will sound Reminder, according to the sound reminder, you can quickly find the items. 3、When items are out of range, as long as your items are around this smart tag, you can track the location of items with the help of Find My network 4、The smart tag with sound made of high quality material, with a BT range up to 40m and a beeping sound ring up to 75dB. 5、Built-in replaceable battery (CR2032) has a battery life of about 365 days and can be used for a long time. 6、It can be used in various scenes to easily track various items. You can use it to locate your travel luggage, keys, backpack, handbag and so on. Specifications: Color: Black / White (Optional) Model: T9 Battery: button cell Working Voltage: DC 3V Working Current: Standby current 5uA/maximum current 10mA Transmit Distance: 40M(open visual distance) Buzzer: Built in 75db(at 10cm) Working Temperature: -5℃-45℃ (23℉-113℉) Working Humidity: 95%(no condensation) Material: ABS Item Size: 40 * 38.6 * 7.3 mm / 1.57 * 1.52 * 0.29 inch Item Weight: 9g / 0.32oz Package Size: 6.4 * 6.4 * 1.3 cm / 2.52 * 2.52 * 0.51 inch Package Weight: 16g / 0.56oz 1 * Sensor 1 * User Manual (English)