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Small rectangular Bluetooth transmitter in black ABS plastic with 3.5 mm jack and dual-prong adapter

Vantrue BTTC-218 Relay Bluetooth Transmitter Dual Link 25hr 3.5mm

SKU CH-FBNY-YNVAM

Bluetooth transmitter plugs into 3.5 mm audio jacks and streams sound to two headphones for up to 25 hours

  • Screen sizeRelay
  • Labor warrantyWarranty - 12 months (extend to 24 months with product regis
  • Adjustable low pass1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
  • Adjustable parametric bass EQ1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
  • Cable typeAuxiliary, Female-to-Male
  • Audio channelsDigital Bluetooth (aptX-Adaptive, aptX-Low Latency)
  • Wireless audio on planes via 3.5 mm jack or dual-prong adapter
  • Qualcomm aptX Adaptive and aptX HD for clear, stable sound
  • Up to 25 hours playtime with volume controls and battery indicator
  • Connect two Bluetooth headphones simultaneously with Dual Link
  • Firmware updates improve compatibility and performance over time

Airplane audio adapter

The Vantrue BTTC-218 Relay plugs into a standard 3.5 mm seatback jack or the included dual-prong airline adapter. It streams in-flight entertainment wirelessly to Bluetooth headphones such as AirPods, Bose or Sony models. The transmitter is designed for travel, gym equipment or tablet use and does not pair with phones or tablets.

aptX Adaptive codec

A Qualcomm chipset provides aptX Adaptive and aptX Low Latency support for clear, stable wireless sound. These aptX features require compatible headphones; AirPods operate with their standard Bluetooth codec. The adapter is a transmitter only and cannot receive audio from a phone, tablet or TV.

Dual Link and firmware updates

Dual Link lets you connect two Bluetooth headphones simultaneously so two listeners can share the same audio source. Intuitive LEDs show connection status for each device. Firmware updates can improve headphone compatibility and connection stability over time.

How it compares

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

Price $41.99
Pricier than about 71% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameVantrue
Model nameBTTC-218
Product typeRelay
Performance
Effective rangeBluetooth, aptX, aptX-Adaptive, aptX-Low Latency, bluetooth, Bluetooth
Display
Screen sizeRelay
Audio & video
Audio channelsDigital Bluetooth (aptX-Adaptive, aptX-Low Latency)
Audio inputs3.5 mm Audio Jack
Audio outputsBluetooth
Audio sensitivity1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Headphone styleDigital Bluetooth (aptX-Adaptive, aptX-Low Latency), 1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Ports & slots
Cable typeAuxiliary, Female-to-Male
Power
Electrical ratingRelay
Power detailsBattery Powered
Size & build
Head unit size1.2 cm × 13.6 cm × 15 cm
Main materialAcrylonitrile Butadiene Styrene (ABS)
In the box
Included hardwareFalse, true
More details
Adjustable low pass1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Adjustable parametric bass EQ1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Cut out diameterSmall
Drilling requiredPlug In
Inner hole diameter for wireSmall
Number of links to amplifier0
Team affiliation1 Piece

Questions about this item

How long will the 25-hour battery last on a long-haul flight?

The built-in battery provides up to 25 hours of continuous playtime, enough for most intercontinental journeys without recharging.

What does aptX Adaptive support actually do for my headphones?

aptX Adaptive dynamically adjusts bitrate for stable, high-quality audio; it requires compatible headphones, while AirPods use their standard Bluetooth codec.

Will the 1.2 cm thick Relay fit my seatback 3.5 mm jack?

The compact 1.2 cm x 13.6 cm x 15 cm body plugs directly into standard 3.5 mm jacks and includes a dual-prong airline adapter for compatibility.

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