・Function: two-way search/unobstructed communication/easy positioning/accurate adaptation/small and portable size/disconnection reminder ・Call the mobile phone: Press the button on the device twice, the device emits the alarm sound, the LED flashes twice, and the mobile APP emits an alarm sound ・Find the device: Click the "Call" button on the APP, the LED of the anti-lost device will flash for 10 seconds and a sound reminder will sound. The more circles displayed on the APP panel, the closer the mobile phone and the anti-lost device are ・Disconnected positioning: When the mobile phone and the item bound with the anti-lost device are disconnected from the Bluetooth-compatible connection (lost), the mobile phone will automatically record the location of the disconnected (lost) location ・Locate and track to find each other: Double-click the anti-lost button to find the mobile phone stand-alone mobile phone APP alarm button to find the anti-lost device: ・Long standby time, the anti-lost device uses the CR2032 battery, it can stand by for 560 days without connection and 180 days with connection ・Easy to find your items with this product, just push the button, you can find your keys or other items, and get out the door in no time Specification: ・Battery model: CR2032 ・No connection standby time: 560 days ・Connected standby time: 180 days ・Working voltage: DC 3V ・Standby current: ＜40uA ・Alarm current: ＜12mA ・Low battery detection: support ・Volume decibel: 90dB ・Bluetooth-compatible frequency band: 2.4G ・Bluetooth-compatible distance: 40m ・Operating temperature: -10°C-70°C ・Product shell material: ABS ・Product appearance size: 35*35*8.3mm ・Net weight: 10g Package included: ・1 x Bluetooth-compatible Key Finder ・1 x English and Chinese User Manual ・Other things not included