Features: The measurement frequency range is larger up to 5HZ-3.500HZ. This EMF meter detects invisible radiation around you and make sure you have a healthy and safe daily life Can be used to test TV, induction cooker, refrigerator, smartphone, computer, electrical wires, WIFI signal, wire tower, and any other low-frequency home appliances, or Ghost Hunting etc. This EMF meter tests electromagnetic field range from 0.1 to 99.99mG with a resolution of 0.01µT. Detects electric field range 1-1999V/for M with 1V/for M resolution and tests ambient temperature range -10～70℃. This EMF reader meter has multiple functions includes data hold & max/min/average measurement, data hold. Specifications: Material: plastomer Size: approx 152x52x26.5mm/6x2x1-inch Display: 3-1/2 digits LCD Frequency: 5-3500Hz Sample time: 0.4 seconds Testing mode: dual Operating temperature: 0-50℃ Working voltgae: DC4.5V Power supply: 3x 1.5V Package Includes: 1x EMF Meter note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.