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| PartNumber | 254-DS4020-RO | 254-DS4028-RO | 254-DS408-RO |
| Description | Speakers & Transducers 40 x 20 x 5.8mm 2W | Speakers & Transducers 40 x 28 x 11.5mm 2W | Speakers & Transducers 40 x 5.1mm 1.0W |
| Manufacturer | Kobitone | Kobitone | Kobitone |
| Product Category | Speakers | Speakers | Speakers |
| Product | Speakers | Speakers | Speakers |
| Type | Electromagnetic | Electromagnetic | Electromagnetic |
| Packaging | Bulk | Bulk | Bulk |
| Termination Style | Gullwing Lead | Gullwing Lead | Gullwing Lead |
| Operating Temperature Range | - 20 C to + 60 C | - 20 C to + 60 C | - |
| Length | 40 mm | 40 mm | - |
| Width | 20 mm | 28.3 mm | - |
| Frequency | 2.2 kHz | 16.5 kHz | 6 kHz |
| Impedance | 8 Ohms | 8 Ohms | 8 Ohms |
| Sound Pressure Level | 72 dBA | - | - |
| Shape | Rectangular | Rectangular | Round |
| Power Rating | 2 W | 2 W | 1 W |
| Depth | 5.8 mm | 11.5 mm | 5.1 mm |
| Dimensions | 40 mm L x 20 mm W | 40 mm L x 28.3 mm W | - |
| Length in | 1.575 in | 1.575 in | - |
| Length mm | 40 mm | 40 mm | - |
| Width in | 0.787 in | 1.114 in | - |
| Width mm | 20 mm | 28.3 mm | - |
| Magnet Material | Neodymium Iron Boran (NdFeB) | Neodymium Iron Boran (NdFeB) | Neodymium Iron Boran (NdFeB) |
| Diameter | - | - | 40 mm |