Description

Feature: 1. against loses: when it beyond the distance set in advance, the main engine and sub-machine will sound to give an alarm. 2. seek: in the distance set in advance, the main engine issues the seeking command, the sub-machine will give an alarm . 3. fix the distance: when the distance between the main engine and sub-machine have changed, it will give an alarm. 4. choose the sound/ vibration: you can choose the sound or the vibration or the sound adds the vibration. 5. match the code: you must match the use code one to one first before you use it. 6. set the distance: it can set four distance grades(*0m;*5m;*0m;*0m)7. prompt the distances: press the prompt key of the distance according to the use environment, set the grade of the actual distance .