Features Advanced Monitoring Capabilities: Measure voltage, current, power, and battery capacity in real time, ensuring you stay informed about your battery's performance and health Comprehensive Circuit Protection: Safeguard your system with customizable settings for overvoltage, undervoltage, and overcurrent protection, ensuring safe and reliable operation High-Quality Materials: Enjoy enhanced usability with silicone shortcut keys, a durable acrylic panel for screen protection, and brass shunt for superior conductivity Integrated Alarm System: Stay alerted with a built-in buzzer that activates when limits are exceeded, providing immediate notifications to prevent potential damage User-Friendly 2.4-Inch Display: Benefit from a clear color screen that presents all relevant data, making it easy to navigate settings and monitor battery performance efficiently Features: 1、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. 2、Easy Hanging: The anti loss device item locator has magnets to help you keep track of your things. The shape is for hanging on keys, bags or luggage. 3、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. 4、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. 5、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 Wirel 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 Lanyard 1 x Storage Box 3 x Manual Package List 1 x Bluetooth Anti Loss Device 1 x Lanyard 1 x Storage Box 3 x Manual