Product advantage                                 1. Low power consumption and long standby time, the standby time is up to 2 years, no need to replace the battery                                  2. Maintenance free: just turn on the device and it will run continuously -no calibration, no sensor replacement, no battery charging                                  3. Ultra-high buzzer alarm sound, 2 high-bright red LED up and down alarm, sound, light and vibration triple alarm to remind workers                                  4. High point alarm, low point alarm, TWA, STEL multiple alarm types, the user can adjust the alarm set point as needed throughout the life cycle                                  5. Automatic logging 10 sets of recent alarm events for easy and accurate record keeping                                  6. Protection class IP68, splash-proof, dust-proof, explosion-proof, shock-proof, intrinsically safe circuit design                                  7. Compact and lightweight design with two-button operation without extensive training                                  8. Affordable, with low cost of ownership                                  9. Small size, light weight, easy to carry                                  10.The shell is made of high-strength materials, designed for a variety of harsh environments, comfortable and durable                                  11.