Review on SURECOM SF401 Plus: Advanced Frequency Counter with CTCCSS/DCS Decoder for Radio Transceiver by Tay Tran

Returned. Terribly inaccurate and very poor sensitivity indeed. Good for anything I can think of and I'm a hobbyist (with an additional ham radio license) fiddling with radio controls and ham radios etc. I love gadgets, even if they have limited uses, but if it's not safe then it's useless. Considering it almost has to touch the source and still reporting the wrong frequency, every time is different, that's a waste of time. Ditch the cheap stuff and use real professional testing and verification equipment. It came back after 4 minutes test.