I ended up returning it because it doesn't resolve well enough to fine-tune a terrestrial antenna. I was better with a compass so was disappointed. Never strike below or above the two indicator lights, even at a 10 degree aiming angle, so it just isn't sensitive enough for my application at 60 miles from the turret assembly. You may find it better suited to your application closer to the transmitters in your area. I also didn't see a way to change the battery, which would severely limit battery life, IMHO.
HOMELYLIFE 600W High Power Voltage Reducer DC 48V 60V 72V Step Down To DC 12V 50A Buck Converter Waterproof Module Car Truck Power Regulator Transformer
12 Review
DC/DC 12V To 24V Boost Converter 40A 960W - Waterproof Voltage Regulator Module For Car Power Supply (10V-16V Input)
15 Review
VINTAR EU To US Plug Adapter 3-Pack For Easy Travel: Europe To USA Converter For Spain, France, And More, Compatible With Type C/E/F Plugs - European To US Power Adapter Solution
11 Review
EXuby Digital Converter Box For TV With RF/Coaxial And RCA Cable For Recording And Viewing Full HD Digital Channels Free (Instant Or Scheduled Recording, 1080P HDTV, HDMI Output, 7 Day Program Guide)
12 Review