TECHNICAL ELECTRONIC SPECIFICATIONS Sensor: Piezoelectric sound transducer activated by polycarbonate diaphragm Power Dissipation: Filter Range: • Bell Mode 15 Hz – 200 Hz • Diaphragm Mode 100 Hz – 500 Hz Battery Life: 20 hours under continuous power on Charging Time: Amplification Range: 6 dB – 18 dB Digital Volume: Operating Environment: • Temperature: -4° F to 104° F (-20° C ~ 40° C) • Humidity: 20% to 95% relative humidity • Atmospheric Pressure 101.325 kPa (760 mmHg) Storage Environment: • Temperature: -4° F to 122° F (-20° C ~ 50° C) • Humidity: 20% to 95% relative humidity Regulatory Standards: Specifications subject to change without notice. Please refer to the Instructions for Use for additional specifications and safety information.