Features 1、Multifunctional mini digital tester signal indicator, it can be used to measure alternating current, voltage, and frequency simultaneously. 2、Wide measuring range of AC0-100A, 60-500V, and 20-75Hz. 3、High brightness easy-to-read 3-digit LED display provides a clear readout. 4、2.2*2.2 inch square panel with cylindrical main body. 5、It can be used as signal indication, alarm signal and accident signal in electric power, telecommunication, machine tool, ship, textile, printing and mining machinery. Specification Features: Multifunctional mini digital tester signal indicator, it can be used to measure alternating current, voltage, and frequency simultaneously. Wide measuring range of AC0-100A, 60-500V, and 20-75Hz. High brightness easy-to-read 3-digit LED display provides a clear readout. 2.2*2.2 inch square panel with cylindrical main body. It can be used as signal indication, alarm signal and accident signal in electric power, telecommunication, machine tool, ship, textile, printing and mining machinery. Specifications: Color: Blue / Green / Red / White / Yellow (Optional) Material: Electrical components Voltage: AC60-500V Current: AC0-100A Frequency: 20-75Hz Item Size: 55 * 31 * 31mm / 2.17 * 1.22 * 1.22in Item Weight: 39g / 1.38oz Package Weight: 44g / 1.57oz Package Size: 7 * 3.5 * 3.5cm / 2.76 * 1.38 * 1.38in Packing List: 1 * Digital Meter Package List 1 * Digital Meter