1. bathroom fan
2. first class abs materials made by lg or Taiwan.
3. sillicon steel motor.
4. built in thermo-cut-off protection.
5. big air flow and quiet.
6. easy installation for wall; glass; ceiling.
7. several options for function: Delay timer(1-20min). Hygro(timer humidity sensor).
8. automatic thermo-actuator for shutter open/close.
