Features Use electricity for three-plug appliances with poor radiation hazard radius loops. As the main detection tool for various electromagnetic radiation protection equipment. Radiation hazard radius for high-voltage transmission line towers. Not only can measure the electromagnetic radiation of household appliances and computers, but also can measure the radiation of mobile phones. Simple operation, one-handed operation, easy to carry and measure on site. Features: -Use electricity for three-plug appliances with poor radiation hazard radius loops. -As the main detection tool for various electromagnetic radiation protection equipment. -Radiation hazard radius for high-voltage transmission line towers. -Not only can measure the electromagnetic radiation of household appliances and computers, but also can measure the radiation of mobile phones. -Simple operation, one-handed operation, easy to carry and measure on site. Specification:  Condition: 100% Brand New Item Type: Radiation Detector Material: ABS Size: Approx. 145 x 20 x 20mm / 5.7 x 0.8 x 0.8in Power Supply: 1.5V(AAA)x 2 (Not included) Detect Range: ≥ 50uw/cm² Note: 1.To replace the battery in time, so as not to cause the battery aging and liquid leakage, if not, the circuit board will be damaged. 2. When the voice alarm call before a weakened obviously, please pull out red back cover and replace the battery. 3. When detected excessive electromagnetic radiation, monitoring pen immediately issued a red flashing light, and the voice alarms continuously, until your environment achieves safe recovery static state detection.   Package List