Alertron – Cellphone Anti-Theft Anti-Loss Device
Insert a sharp object like the tip of a paperclip into the pairing hole. (You only have to do this once and thereafter Alertron will re-establish its Bluetooth connection with your phone should either be powered off). From your cellphone search devices and locate Alertron. Initiate pairing. By the way the password is 0000.
Once paired, if Alertron and your cellphone stay within 5 meters of each other…nothing happens. But should they become separated, Alertron will start to vibrate and then emit a disturbing high pitch alarm!
Bring them together again, the vibration and alarm stops. Separate them, the vibration and alarm starts up.