| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
| Oscillation Frequency(KHz) | 2.7±0.3 |
| Operating Voltage(Vdc) | 2.5~4 |
| Rated Voltage(Vdc) | 3 |
| Current Consumption (mA/max) | 35at Rated Voltage |
| Sound Pressure Level (dB/min) | 83 at 10cm at Rated Voltage |
| Tone/Pulse Rate | Constant |
| Operating Temperature (°C) | -20~+70 |
| Storage Temperature (°C) | -30~+80 |
