1All?directional induction voltage power source, automatic trigger detection mode, with sound and light alarm mode, to ensure the safety of near electricity workers. 2Adopt non-contact induction technology, alarm accurately, power saving and durable, standby time up to 12 months. 3Provides a safe, practical and convenient new style high voltage alarm device for live working operater. 4Super high sensitivity, can sensing the voltage of 40V~1kV. The alarm will send out a sound and light alarm according to the safety distance of the corresponding voltage level. 5High - voltage alarm is widely used in electric power, railway, industrial and mining enterprises and other enclosed electric power operations.Item Type: Approach Electric Alarm_x000D_Material: ABS_x000D_Color: As shown in the picture_x000D__x000D_Alarm voltage and distance_x000D_ModelVoltage levelAlarm distance_x000D_ETCR1870C40V5CM_x000D_110V10CM_x000D_220V15CM_x000D_600V40CM_x000D_1KV60CM_x000D_Technical Parameters_x000D_Power supply2xCR1632 Button battery (not included)_x000D_Meter voltage rangeETCR1870C: 40V-1KV_x000D_Distance error10cm (231, 80%RH under basic conditions)_x000D_Working frequency50/60HZ_x000D_Electric test modeNon-contact mode_x000D_Detection modeAuto trigger_x000D_Battery LifeContinuous work (sound and light alarm): about 24 hours_x000D_Standby time: about 12 months_x000D_Alarm methodIndicator light: LED visibility under 8000LX visible light_x000D_Buzzer: above 60dB (distance 60CM)_x000D_Protection levelIP54_x000D_Working environment-10~40; less than 80%RH_x000D_Storage environment-1060; less than 70%RH_x000D__x000D__x000D__x000D_How to Use:_x000D_1: This arm type alarm is not a voltage tester, and it is prohibited to use it as a voltage tester._x000D_Because high-voltage operation is very dangerous, operators must undergo rigorous training and obtain corresponding high-voltage operation certifications before using the instrument for on-site testing._x000D_2: When using, please wear the alarm on your arm so that the triangular symbol on the surface of the alarm point faces the direction of your fingertips._x000D_3: This alarm only provides safety assistance measures, please do not overestimate the safety guarantee after wearing this alarm._x000D_4: Near grounded metal structures (such as transformer), the working distance of the alarm will not be reduced._x000D_5: If the alarm is hung on the sleeve of work clothes or rubber gloves, the sensitivity will not decrease._x000D_6: When the alarm gets wet in the rain, please take out the battery and dry it naturally in a cool place. Please do not use the alarm in a humid state, this time it will greatly shorten the working distance of the alarm, even the alarm will always sound an alarm._x000D_7: If the alarm is hit or hit by a strong external force, check the appearance of the alarm and press the "TEST" button to test to ensure that the alarm functions normally._x000D_8: Please read the manual carefully after purchase. 1 x Approach Electric Alarm(Battery Not Included) 1 x Instruction Manual 1 x Button Sheet