壓電喇叭
| 型號 | 規格 | 尺寸 | 規格書 |
| OBO-40204F-01 | 蜂鳴器: 85db at 4Khz/27Vp-p Square Wave 喇叭： 4 ohm, 85±3 dB/1W/0.5M 或88±3 dB/5W/0.5M average at 1000Hz |
42 dia. * 23mm |  |
| OBO-11032G-01C | 32ohm, 97±3dB /0.178V at 1000Hz (Artificial Ear IEC-711) |
11.4 dia. * 5.25mm | |