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| Part Number | WM-R30B | WM-R57A |
| Manufacturer | Panasonic Electronic Components | Panasonic Electronic Components |
| Series | WM-R | WM-R |
| Packaging | Bulk | Bulk |
| Product Status | Obsolete | Obsolete |
| Technology | Piezo | Piezo |
| Type | General Purpose | General Purpose |
| Frequency Range | 400 Hz ~ 100 kHz | 150 Hz ~ 100 kHz |
| Frequency - Self Resonant | - | - |
| Impedance | - | - |
| Efficiency - dBA | 70.00 | 70.00 |
| Efficiency - Testing | 300mm | 500mm |
| Efficiency - Type | Sound Pressure Level (SPL) | Sound Pressure Level (SPL) |
| Power - Rated | - | - |
| Power - Max | - | - |
| Port Location | Top | Top |
| Shape | Square | Rectangular |
| Material - Cone | - | - |
| Material - Magnet | - | - |
| Ingress Protection | - | - |
| Ratings | - | - |
| Termination | Solder Pads | Solder Pads |
| Size / Dimension | 1.181" L x 1.181" W (30.00mm x 30.00mm) | 2.264" L x 2.205" W (57.50mm x 56.00mm) |
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