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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

  • TypeRelay
  • LaborWarranty - 12 months (extend to 24 months with product regis
  • PartsWarranty - 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
  • CableAuxiliary, Female-to-Male
  • 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.

Highlights

  • 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

Specifications

BrandVantrue
ModelBTTC-218
TypeRelay
LaborWarranty - 12 months (extend to 24 months with product registration) / Extensive Support: Chat, Email, Phone, Online Clinic, Video Tutorials, FAQ and Registration - avantree.com/support
PartsWarranty - 12 months (extend to 24 months with product registration) / Extensive Support: Chat, Email, Phone, Online Clinic, Video Tutorials, FAQ and Registration - avantree.com/support
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
CableAuxiliary, Female-to-Male
ChannelsDigital Bluetooth (aptX-Adaptive, aptX-Low Latency)
CurrentRelay
Cut Out DiameterSmall
Drilling RequiredPlug In
Frequency Blockednot_applicable
Hardware Includedfalse, true
Head Unit Size1.2 cm x 13.6 cm x 15 cm
Inner Hole Diameter for WireSmall
Inputs3.5mm Audio Jack
MaterialAcrylonitrile Butadiene Styrene (ABS)
Max Recommended Power HandlingTablet,PC, Gym Equipment, 1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Number of Links to Amplifier0
OutputsBluetooth
PowerBattery Powered
RangeBluetooth, aptX, aptX-Adaptive, aptX-Low Latency, bluetooth, Bluetooth
Screen SizeRelay
Sensitivity1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Test DescriptionRefer to general Bluetooth device safety guidelines, including proper battery handling, awareness of potential interference with other wireless devices, and cautious use in extreme temperature or humidity conditions.
THDDigital Bluetooth (aptX-Adaptive, aptX-Low Latency), 1. aptX-Adaptive Support; 2. Dual Link; 3. 25hr Playtime
Sports Team1 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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