The industry's smallest air tag provides high tracking performance via Bluetooth connection. - Model Name: BENGERA - Color: Black - Features: Industry's smallest air tag - Connectivity: Bluetooth Brand: Benlera Batteries Included: Yes Material: Plastic Number of Batteries: 1 CR2032 battery (included) Product Dimensions: 29mm length x 29mm width x 10mm thickness About this product 【Lost Item Prevention Tag - Protects Privacy】Utilizes cutting-edge tracking technology to provide accurate, real-time location information. When the smart tag goes out of range of your iPhone, you will receive an immediate notification on your iPhone, alerting you to the possibility of loss. This gives you valuable time to recover your important belongings. With a built-in NFC function, even if the smart tag is lost, the tag will be locked when "Lost Mode" is turned on. When someone finds the smart tag and holds it to the back of their smartphone, the NFC function activates, automatically retrieving the owner's contact information. Location information, etc., can only be confirmed with the linked Apple ID. Unless you unpair it, the lost item prevention tag cannot be connected to another Apple ID even if it is reset. Also, because it works with Apple's "Find My" network, all data and information are encrypted based on Apple's privacy policy, and privacy is strictly protected. Individuals cannot be identified, so you can use it with peace of mind.