BTECH QHM01 3.5mm Listen-ONLY Heavy-Duty Surveillance Earpiece (Includes earmolds and Earbud) with Clear Acoustic Coil Tube for Two-Way Radios, Transceivers, and Radio Speaker Mics Jacks
| Country | USA |
| Manufacturer | Helen Harper |
| Binding | Kindle Edition |
| ReleaseDate | 2017-02-17 |
| Format | Kindle eBook |