A Bluetooth transmitter lets you play music from your devices in an older car, and usually adds USB charging, too. Pho ...

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The UGREEN Bluetooth Transmitter and Receiver will modernize any old device with a 3.5mm audio input or output. It's on sale for just $14.99!

This Bluetooth audio transmitter comes in at $79, but you never have to worry about charging again as it powered totally via its USB power. Here's another Bluetooth transmitter with tons of ...

TL;DR: Upgrade your older stereo system with this Bluetooth transmitter and receiver for just $42.97 (reg. $59.00) — Hurry, the offer ends 2/23 at 11:59 p.m. PT! If your car’s stereo system doesn’t ...

Bring old devices back to life — stream wirelessly with this Bluetooth adapter. TL;DR: Make any device Bluetooth-compatible with the EVE II Bluetooth Transmitter & Receiver, now just $42.97 ...

• A waterproof Kindle that can hold and entire library’s worth of books in one slim tablet.

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This program supports transmitting static drone ID data via Wi-Fi Beacon or Bluetooth on a desktop Linux PC or Raspberry Pi HW. For further information about Open Drone ID and the related ...

Phased-based ranging (PBR) delivers precise measurements by checking the phase difference of reflected radio waves (Fig. 1).

However, there is no analog audio option, so the cans will always need to be charged up if you want to use them. If you plan ...