Features:
1. Spray water protected.
2. 2 light LED diodes.
3. LED reciprocating double color instructions.
4. Including 1 memory LED 20 seconds afterglow.
5. Automatic night LED function.
(Turn on/off pressing "V" for 3 seconds)
6. Special drop back function:Different LED color and sound.
7. Tone control 4 levels.
8. Volume and volume.
9. Sensibility control 4 levels.
10. Plug socket for bite indicator.
11. Battery: 1X3.7V lithium battery
12. Alarm can be rechargeable