Feature: -100% brand new quality and high quality -GPS tracking anti-lost device, hung on keys, wallets, mobile phones, watches, pets, children or other valuables to find and search -High-quality design ensures the use of product functions and low battery consumption -Simple tracking through the app, as well as wireless recording -Wireless 4.0 can connect with 2 anti-loss devices at the same time use: -Power on: Press and hold the switch button of the anti-lost device for 3-5 seconds and hear two beeps, and the device will power on -Shut down: Press and hold the switch button of the anti-lost device for 35 seconds and hear a long beep, the device will shut down -Map positioning, after the anti-lost device is disconnected from the APP, the address of the disconnected point will be displayed in the lost record Specification: -Material: ABS -Color: Black -Shape: round square 37 x 37mm / 1.45*1.45 " -Wireless version: Wireless 5.0 -Working distance: ?25m (outdoor environment) -Battery: CR2032 lithium button battery (included) Packaging materials include: -1x Anti-lost GPS tracker -1x manual