| FM313A | FM113B |
| 12-80V Piezoelectric plate Night | 12-24V Loudspeaker Night be quite |
| FM313B | FM113B |
12-80V Loudspeaker Night be quite | 12-24V Loudspeaker Night whispered |
| FM313A-1 |
| 12-80V Loudspeaker Night whispered |
contact; fred zhou
email: zhou_wenjun@alic.com
skype: fredzhou8866