1. Digital electromotive force meter built-in 3 electromagnetic radiation sensors2. Measure the radiation of electromagnetic stove, microwave oven, refrigerator, to protect the safety of the home3. Buzzer alarm design, when the test results exceed the safety value, the instrument will automatically alarm4. With flashlight, can also work at night5. Internal special ABS material, drop-proof and durableParameters:1. Resolution: magnetic field: 0.1mg/0.01μT; electrical field: 1V/M2. Range: magnetic field: 0.1-199.9mg/0.01-19.99μT; electrical field: 1-1999V/M3. Alarm threshold: magnetic field: greater than 4mg/0.4μT; electrical field: greater than 40V/M4. Frequency response range: magnetic field: 5hz-300hz; electrical field 4hz-3500mhz5. Accuracy: about 15 percent6. Temperature range: -20-60 degrees celsius7. Sampling time: about 0.4 seconds8. Low voltage indication: less than 6.8V9. Operating temperature: 0-40 degrees celsius / 32-104 degrees fahrenheit10. Operating humidity: 45-80 percent RH11. Power supply: 3 x 1.5V AAA batteries (not included in shipment)12. Size: 220mm x 60mm x 55mm13. Weight: about 170g (without battery)Specification: Package Weight One Package Weight 0.26kgs / 0.56lb One Package Size 24cm * 8cm * 6cm / 9.45inch * 3.15inch * 2.36inch Qty per Carton 50 Carton Weight 11.40kgs / 25.13lb Carton Size 50cm * 38cm * 34cm / 19.69inch * 14.96inch * 13.39inch Loading Container 20GP: 412 cartons * 50 pcs = 20600 pcs40HQ: 958 cartons * 50 pcs = 47900 pcs