I finally got a chance to use them this week and they worked great. The cigarette lighter plug has a red LED that lights up when plugged in, and the adapter snaps right into the radio. At full power, the radio works perfectly and does not heat up. They're so reasonably priced that if you even think you're going to need one at night, just buy them!
KEiiD Wooden Retro CD Player With Bluetooth, FM Radio, USB AUX Inputs, Speakers And Adjustable Bass/Treble For Home Stereo System And Boombox
27 Review
Experience Ultimate Music Enjoyment with Sony CD Boombox ZSPS50B.CED - USB Playback & Audio Input Included!
13 Review
KEiiD Bluetooth Stereo Shelf System With Retro CD Player, Speakers, FM Radio Receiver, USB, AUX, Bass/Treble EQ, Wooden CD Music Bookshelf System For Home Audio
28 Review
SINGING WOOD Boombox Portable Bluetooth
9 Review