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| Brand Name | Callvi | Model Number | V-25 |
| Type | Professional Amplifier | Channels | 2 (2.0) |
| Place of Origin | Guangdong, China | Product Name | Voice Amplifier |
| Max output power | 18W | Charging Voltage | DC 10V/500mA |
| Battery | Rechargeable 18650 type Lithium battery Total 7.4V/2200mA * 2pcs | Color | Black case, Red case |
| Material | ABS plastic material | Working Temperature | -10u2103 to 45u2103 |
| Working time | 6 to 9 hours | Size | 137mm*53mm*105mm |
| Application | Teachers,Coaches,Auctioneers,Studio instructors and so on |
4th Floor, 4th Building, Factory Building, Phase 3, Fuan Industry Zone, Xintian Community, Fuyong Street, Baoan District
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