| FM131A | FM231A |
| 12-24V Piezoelectric plate Night be quite 95+/-5DB | 12-48V Piezoelectric plate Night be quite 95+/-5DB |
| FM131B | FM131B-1 |
| 12-24v the speaker nightly and quiet 107+/-5DB(A) | 12-24V Loudspeaker Night whispered |
| FM231B |
| 12-80V Piezoelectric plate Night be quite 107+/-5DB |
Contact : Fred zhou
TEL:86 551 6229 9675
Mobile:0086 135 1560 2708
E-mail: zhou_wenjun@alic.com