Two way electronic anti-lost alarm
Smallest 2 way alarm
lightest electronic anti-lost alarm
Best personal alarm.

Two-way alarm

This is a 2-way alarm, when the 2 apples leave each other more than 8 meters, theyll both sound alarm in 2 seconds.

Frequency: 2.4GHZ
Size: 3.3X2.8X1.0cm
Weight: 8g
Alarm: 75DB
Battery: 1XCR2032
Battery last: 200 hours.