GQ EMF-390 Electromagnetic EMF field strength meter
Read EMF, RF and EF at same screen at once
Detects all three invisible radiation source and gives warning
Auto identify the possible radiation source
Rechargeable battery can be charged on a any USB port or cell phone charger
Every second data logging and save up to 24 hours history data
Professional 18650 lithium ion battery included.
Details & specs here: https://www.gqelectronicsllc.com/comersus/store/comersus_viewItem.asp?idProduct=5678