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Small black plastic Bluetooth adapter with 180 degree rotatable 3.5mm jack and USB-C cable

Happfeel Bluetooth 5.4 Transmitter Receiver 180° Rotatable 3.5mm Aux USB-C Adapter

SKU CH-EHT2-7KR3Q

Bluetooth 5.4 transmitter-receiver with 180° rotatable 3.5 mm plug and USB-C cable, aptX Adaptive under 40 ms latency, dual-headphone pairing, hands-free mic, 26 h RX or 15 h TX battery

  • Labor warranty12M
  • Adjustable low passBluetooth 5.4, Qualcomm Core, 180° Rotatable Flexible Jack,
  • Adjustable parametric bass EQBluetooth 5.4, Qualcomm Core, 180° Rotatable Flexible Jack,
  • Cable typeAuxiliary, Female-to-Male
  • Audio channelsStereo
  • Drilling requiredWireless
  • Bluetooth 5.4 and Qualcomm chip keep audio in sync under 40 ms latency
  • 180° rotatable 3.5 mm plug plus USB-C cable fit tight ports on planes and cars
  • Transmitter mode pairs two headphones at once for shared movie watching
  • Receiver mode connects two phones so you can switch music without re-pairing
  • Battery lasts 26 hours in receiver mode or 15 hours in transmitter mode per charge

3-in-1 Bluetooth 5.4 Audio Adapter

This Happfeel adapter works as a transmitter, receiver, or hands-free calling bridge. It streams audio from airplane seats, TVs, or a PS5 to wireless headphones, and upgrades wired speakers or car stereos with Bluetooth input. The design suits travellers, gamers, and drivers who want wireless flexibility without replacing existing equipment.

Dual 3.5mm and USB-C Connectivity

A 180° rotatable 3.5 mm plug and a built-in USB-C cable let the unit fit tight ports on armrests, controllers, or dashboards. In transmitter mode it pairs two headphones simultaneously; in receiver mode it connects two phones for quick music switching. No extra cables or power bricks are required for operation.

Up to 26-Hour Battery and Sub-40 ms Latency

The internal battery delivers 26 hours in receiver mode or 15 hours in transmitter mode, recharging fully in two hours. A Qualcomm chip running Bluetooth 5.4 keeps latency below 40 ms for lip-sync accuracy during movies and gaming. The compact plastic body measures 1.905 cm x 11.6078 cm x 15.494 cm and stays cool during extended use.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 55% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameHappfeel
Product colorBlack
Performance
Effective rangeBluetooth 5.4, bluetooth
Audio & video
Audio channelsStereo
Audio inputs3.5 mm AUX, USB-C
Audio sensitivityBluetooth 5.4, Qualcomm Core, 180° Rotatable Flexible Jack, Lower Latency, Hi-Fi Stereo, Adjustable Volume, Enhanced Mic, Hands-Free Calling, Quick Pairing, Airplane Travel Ready.
Headphone styleStereo, Bluetooth 5.4, Qualcomm Core, 180° Rotatable Flexible Jack, Lower Latency, Hi-Fi Stereo, Adjustable Volume, Enhanced Mic, Hands-Free Calling, Quick Pairing, Airplane Travel Ready.
Ports & slots
Cable typeAuxiliary, Female-to-Male
Power
Power detailsCorded Electric
Size & build
Head unit size1.905 cm × 11.6078 cm × 15.494 cm
Main materialPlastic
In the box
Included hardwareFalse, true
More details
Adjustable low passBluetooth 5.4, Qualcomm Core, 180° Rotatable Flexible Jack, Lower Latency, Hi-Fi Stereo, Adjustable Volume, Enhanced Mic, Hands-Free Calling, Quick Pairing, Airplane Travel Ready.
Adjustable parametric bass EQBluetooth 5.4, Qualcomm Core, 180° Rotatable Flexible Jack, Lower Latency, Hi-Fi Stereo, Adjustable Volume, Enhanced Mic, Hands-Free Calling, Quick Pairing, Airplane Travel Ready.
Drilling requiredWireless
Team affiliationSan Francisco 49ers

Questions about this item

How long does the battery last before it needs recharging during a long flight?

In transmitter mode the battery runs for 15 hours and in receiver mode for 26 hours on a full charge.

Does the adapter get warm or make any noise when it runs all day?

The unit is passively cooled with no fan so it stays silent and only gets slightly warm during extended use.

What must my headphones or speakers support for the aptX Adaptive low-latency connection to work?

They need to support Bluetooth 5.4 with aptX Adaptive to achieve the under 40 ms latency figure.

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