Avantree Relay Airplane Bluetooth Adapter for 2 Headphones

Avantree Relay is an airplane Bluetooth transmitter that sends audio from a 3.5 mm source to up to two Bluetooth headphones or earbuds. Its reference price is $34.99, with a 4.3/5 rating from 6,744 reviews according to the provided product information.

Design & Real-World Comfort

Relay uses a compact design that fits easily in a travel bag. It plugs into an airplane entertainment system through the 3.5 mm audio jack and includes a dual-prong airplane adapter.

• Onboard volume controls for convenient adjustment.
• Battery indicator for monitoring charge status.
• Supports connection to two Bluetooth headphones at the same time.
• Simple setup without a dedicated app.

Acoustic Sound Quality & Tech

Qualcomm audio technology with aptX Adaptive and aptX HD support helps deliver stable, detailed wireless sound when paired with compatible headphones. Actual performance depends on the headphones, source device and surrounding environment.

Avantree Relay is a transmitter, not a receiver. It has no microphone and is not designed for phone calls, TVs, hearing aids, musical instruments or receiving audio from another device.

Battery Life & Smart Connectivity

The built-in battery provides up to 25 hours of playtime, making Relay suitable for long-haul flights. Pairing follows three steps: plug Relay into the 3.5 mm jack, place the headphones in pairing mode and connect.

1. Plug Avantree Relay into the airplane's 3.5 mm jack or dual-prong adapter.
2. Put one or two Bluetooth headphones into pairing mode.
3. Wait for the connection, then adjust volume using Relay or the headphones.

Figure 1: Core specifications and acoustic engineering infographic for Avantree Relay Airplane Bluetooth Adapter for 2 Headphones

Technical Specifications Table

Pros & Cons Analysis

Pros

• Lets two people share airplane entertainment audio.
• Up to 25 hours of battery life for long trips.
• Supports aptX Adaptive and aptX HD with compatible devices.
• Easy pairing with a dual-prong adapter included.

Cons

• Transmits audio only and does not receive audio.
• No microphone or phone-call support.
• Not intended for TVs, hearing aids or musical instruments.
• Sound quality depends on compatible Bluetooth headphones.

Frequently Asked Questions (FAQ)

How many headphones can Avantree Relay connect?

Relay can transmit audio to up to two Bluetooth headphones or earbuds at the same time.

Can Relay be used for phone calls?

No. Relay has no microphone and works only as a transmitter from a 3.5 mm audio source.

Can Relay be used with a phone?

It is designed for 3.5 mm audio sources, especially airplane entertainment systems. Check the source device and any required adapter before purchase.

How long does the battery last?

The stated maximum playtime is up to 25 hours, depending on volume, connected headphones and usage conditions.