I took one apart and tried it. Beautiful bright lights with multiple display options. I like that they are waterproof (IP66). Each time you press the power button, a different lighting mode is selected. Quickly press the power button twice to turn on the dual white LED flashlight. The magnet is a small metal point in the center of the back panel. There is also a foldable plastic hook for hanging. To install the batteries: 1. Using a Phillips screwdriver2, loosen the two screws. Then use a knife or flathead screwdriver to pry up the back cover with the tiny protruding tabs. Be careful when using the knife.3. Insert 3 AAA alkaline batteries with correct polarity4. Slide the cover back into position so that the tabs fit into the slots5. Then reinstall the screws. I have to leave them with the batteries installed as I don't want to do these steps in the dark with a damaged car. Then I would need a computer or a phone to remind me to replace them at least once a year, otherwise the batteries would eventually run out. If I didn't need the flashlights I would easily forget them which is why some kind of reminder is important to not damage them and to keep them useful with fresh batteries.
LAMPHUS SolarBlast 36" Amber LED Traffic Advisor Light Bar [SBTA84-AM] [TA Controller] [19 Flash Modes] [IP 67 Waterproof] Directional Yellow Flashing Emergency Safety Light Bar For Trucks Vehicles
25 Review
Upgraded ASPL Visor Light Bar - 15 LED, 29 Flash Patterns, Split Mount For Upper Windshield - Emergency Strobe And Hazard Warning Light With Take-Down Feature - Purple/White
36 Review
12-LED Ultra Slim Surface Mount Flashing Strobe Lights For Truck Car Vehicle Emergency Beacon Hazard Warning - 8Pcs Sync Feature LED Mini Grille Light Head (Red/Blue)
25 Review
SAE Class 1 NanoFlare 4W Amber LED Strobe Light With 72 Flash Modes For Emergency Warning On Trucks And Vehicles - Sync-Able And Surface-Mounted Yellow Amber Grille Light For Police
24 Review
1999-2002 Chevy Silverado/Tahoe Headlight Assembly - 2 Year Warranty!
27 Review
Pack Of 2 TMH 6 Inch Oval White LED Lights For Truck Trailer With Reverse Lamp, Turn Signal, Side Marker And Tail Functions - Surface Mount, Ideal For Trailers, Buses And Vehicles, 12V DC
25 Review
09-14 Ford F150 DRL LED Tube Dual Projector Headlights - AlphaRex Base Model Jet Black With Smoke Lens
23 Review
Black Bezel Halogen Type LED Halo Ring Eye Lid Projector Headlights For 2006-2008 BMW E90 3 Series 4 Door Sedan
32 Review