Feature:1. Multiple Functions: Able to simultaneously measure multiple types of radiation, including electric field radiation, magnetic field radiation, and high frequency radiation.2. Simple Operation: You can control functions such as on off and sound with one key, avoiding accidental touch, ensuring simple and reliable operation.3. Long Endurance: Built in 320mAh high performance lithium battery, with long lasting battery life, with Type C charging port for greater convenience.4. Compact and Portable: With a compact size, this electromagnetic field radiation tester is very convenient to carry, can be easily placed in your bag.5. Widely Used: This EMF tester can be used in various electrical appliances such as mobile phones, computers, televisions, microwaves, etc.Specification:Item Type: Electromagnetic Field Radiation TesterMaterial: ABSMeasurement Range: Electric field: 1-1999V/m; Magnetic field: 0.1-99.9mGSensitivity: Electric field: 1V/m; Magnetic field: 0.1mGMeasurement Accuracy: 5%Measurement Bandwidth: 50Hz to 3500MHzDisplay Screen: Color LCD display screenUsage Temperature Humidity: Temperature: -10~+60; Humidity: Less than 80% RHBattery: 1 x 3.7V 320mAh lithium battery (built in).Package List:1 x Electromagnetic Field Radiation Tester1 x Hanging Rope1 x USB Cable1 x Instructions