Features Adjustable Volume --- Are you worried about the ringing sound of the Bluetooth anti loss device will affect your rest and quiet, don't worry, the volume of our device is adjustable from 50‑80dB. Easy Hanging --- The anti loss device item locator has magnets to help you keep track of your things. The shape is perfect for hanging on keys, bags or luggage. Find Nearby --- When within the working range of the Bluetooth anti loss device item locator, ringing the bell and let your smart anti loss device find the lost object for you. Working Distance --- Our Bluetooth anti loss device battery standby current is 15uA, working current is 3.7mA, working distance is 10-20m indoor, 20-50m open. IP67 Waterproof Rating --- Bluetooth anti loss device key finder has IP67 waterproof rating and built in battery capacity of 150mAh to meet your daily needs. Specification: Item Type: Smart Bluetooth Anti Loss Device Wireless Connection: For BLE 4.2 Volume: 50-80dB (Adjustable) Battery Type: Built In CR2032 Capacity 150mah (Shipped With Built In Battery) Battery Standby Current: 15uA Operating Current: 3.7mA Working Distance: Indoor 10-20m, Open 20-50m Package List:1 x Bluetooth Anti Loss Device 1 x Lanyard1 x Storage Box3 x Manual Package List 1 x Bluetooth Anti Loss Device 1 x Lanyard 1 x Storage Box 3 x Manual