1) On/Off
2) Three water pumps
3) Bubble pump can set heater temperature 800W
4) Thermostatic heating 4KW
5) Anti-freeze function Automatically rise when the temperature below 5oC
6) High-frequency digital tuning FM, Self-existence selection program
7) CD signal input terminal
8) Underwater light function AC12V 15W
9) Ozone AC12V 8W
10) Self-locking protection
11) Dehydration protection, Leakage protection
12) Level detection, Probe detector