Feature: 1. Alarm Range: Waterproof high and low voltage alarm, with a low voltage alarm range of 40V‑1kV and a high voltage alarm range of 1kV‑500kV, suitable for a wide range of applications. 2. No Contact: This near electric alarm can be measured without physical contact, avoiding the potential danger of direct contact with live wires and improving security of the operation. 3. IP67 Protection: This voltage induction alarm has IP67 protection grade, with shockproof and dustproof structure, which can adapt to various complex environmental conditions. 4. Alarm Modes: This waterproof voltage induction alarm has vibration, light, and buzzer alarm modes, which are sensitive and fast in response, greatly improving detection efficiency. 5. Applications: This voltage detector alarm is widely used in telecommunication, power, meteorology, computer room, oil fields, electromechanical installation and maintenance, and other fields. Specification: Item Type: Voltage Alarm Model: ETCR1840 Function: Near Electricity Alarm Battery: 1 x Lithium Battery (600mAh) (Built in Battery) Voltage Alarm Range: Low Voltage: 40V-1kV, High Voltage: 1kV-500kV Frequency: 50Hz/60Hz Detection Method: Non Contact Working Time: Continuous Working (Alarm Mode): About 8 hours; Standby Time: 6 months Alarm Method: Vibration, Light, Buzzer Insulation Pole: Extendable 1m / 3.3ft Protection Grade: IP67 Operating Temperature and Humidity: -10℃-40℃: Below 80%RH Storage Temperature and Humidity: -10℃-60℃: Below 70%RH. Package List: 1 x Voltage Alarm1 x Charger1 x Insulation Pole1 x Storage Bag