This item is discontinued and replaced by item no.
- Telephone line powered (no main voltage or batteries required )
- Greatly reduced installation costs
- Penetrating 105 dBA output
- Volume control
- Maintenance-free operation
HB-105 loud tonecaller is powered by the PABX and PSTN line voltage (60-100 V AC). A variable output (85-105 dBA) is possible by means of a potentiometer located within the unit. HB-105 is a suitable additional ringer device for telephones in weather-exposed and noisy areas.