■4Can emit light and sound, withRed green dual color highlightLED1Lamp beads and

A buzzer.1■pieceCR20321000Button battery, can meet half a year's demand

The application requirements for secondary search.

■10There are three reminder modes: red flashing, green flashing, and alternating red and green flashing, which can control whether the buzzer sounds.

■2Battery level report, undervoltage reminder, red light flashing slowly after undervoltage reminder to replace battery, remaining battery can continue to be usedOh my god.■

Copper inlay pieceM3Nuts not only ensure a tight fit between the upper and lower covers, but also make it easy to disassemble and replace the battery.80■

Wireless transmission power4.5dBmLaunch once per second, with a distance of no less than

Rice.■Wireless frequency band adopted

2.4GHzDeveloping microwave frequency bands globally without the need for application or payment.

■-20Can be suspended using a keychain703M