Not only are there multiple ways to power the radio, 

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A collection of all of the products, services and brands that I either personally use and/or recommend.

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The best radios with crisp and clear audio for an unforgettable drive in movie theater experience.

Lots of power in a little package. Listen to the radio wherever you are, connect to external speakers or headphones, and enjoy the programming.

Portable, compact, and easy to carry around in the protective case. Water and dust-proof features are just a nice bonus.

The large analog tuning knob lets you easily adjust the station, and the integrated auxiliary input lets you play music from your smartphone and other devices.

Built-in speaker and headphone jack
Telescoping antenna
Carrying strap for added convenience
Battery powered; 2 x AA (sold separately)
LED tuning indicator & LED battery status indicator
4.69 x 2.74 x 1.50 in(W X H X D)

Small, compact and packs a punch! It's great for the drive in movie theater experience, but it's also great as an emergency radio too!

FosPower 2000mAh NOAA Emergency Weather Radio (Model A1) Portable Power Bank with Solar Charging, Hand Crank & Battery Operated, SOS Alarm, AM/FM & LED Flashlight for Outdoor Emergency

Drive In Movie Theater Radios

Pocket Radio with Great Audio

Xeneo X21 Portable Outdoor Wireless Bluetooth Speaker Waterproof with FM Radio, Micro SD Card Slot, AUX for Shower - Hard Travel Case Included

Studebaker Portable Retro AM/FM Radio

Sony ICFP26 Portable AM/FM Radio

Sangean MMR-88 Portable Stereo