Turn older wired audio devices into wireless Bluetooth devices with the Astrum BT230 Bluetooth Audio Transmitter & Receiver. Designed for simple everyday use, the BT230 allows you to add wireless Bluetooth functionality to TVs, car stereos, speakers, headphones, PCs, and home entertainment systems without replacing your existing devices.

Whether you want to stream TV audio to wireless headphones, play smartphone music through wired speakers, add Bluetooth to an older car AUX system, or use wireless audio while travelling, the BT230 makes wired audio setups more flexible and convenient.

With both Transmit (TX) and Receive (RX) modes, Bluetooth 5.3 connectivity, USB-C charging, and a compact portable design, the BT230 is an easy wireless upgrade solution for home, travel, entertainment, and everyday listening.

2-in-1 TX/RX Modes - Send or Receive Bluetooth Audio

• TX Mode (Transmit) - Send audio FROM TVs, PCs, or entertainment systems TO Bluetooth headphones or speakers.
• RX Mode (Receive) - Receive Bluetooth audio FROM smartphones or tablets TO wired speakers, car stereos, or AUX devices.

The BT230 allows older wired devices to work with modern wireless Bluetooth audio.

Add Bluetooth to TVs - Wireless Headphone Listening

Use TX mode to stream TV audio wirelessly to compatible Bluetooth headphones or speakers for more convenient late-night viewing and private listening.

Upgrade Older Car AUX Systems - Wireless Music & Calls

Use RX mode to add Bluetooth streaming and hands-free calling to compatible car stereos with AUX input.

Bluetooth 5.3 - Stable Wireless Connectivity

Bluetooth 5.3 provides faster pairing, stable audio transmission, and smoother wireless performance for music, movies, gaming, and everyday listening.

Hands-Free Calling - Built-In Microphone

Integrated microphone supports hands-free calls in RX mode when connected to compatible car stereos, speakers, and AUX systems.

Compact Portable Design - Easy to Carry Anywhere

Durable zinc alloy construction with an ultra-compact lightweight design makes the BT230 easy to carry, store, and use at home, in the car, during travel, or on flights.

Zinc Alloy Construction - Durable Premium Feel

Durable zinc-alloy housing provides improved strength and a more premium feel compared to standard plastic adapters.

Perfect For

• TVs without Bluetooth
• Wireless headphone listening
• Older car stereos with AUX
• Wired speakers and home audio systems
• Travel and in-flight entertainment
• Gaming and movie audio
• Upgrading older wired devices

Technical Specifications

• Model: BT230
• Bluetooth Version: 5.3
• Wireless Range: Up to 10m
• Operating Modes: TX (Transmit) / RX (Receive)
• Charging Port: USB-C
• Charging Time: Approx. 45 Minutes
• Audio Input/Output: 3.5mm AUX
• Material: Zinc Alloy + ABS
• Working Time: Up to 5.4 Hours (RX Mode), Up to 2 Hours (TX Mode)
• Standby Time: Up to 6 Months
• Dimensions: 51.5 × 23 × 13.6mm
• Weight: Aprrox. 15g

About Astrum

Astrum is a global consumer technology brand focused on practical, well-engineered products for everyday use. The BT230 reflects that commitment by delivering simple wireless audio conversion, compact portability, and reliable Bluetooth connectivity for modern entertainment and travel needs.

What's in the box
1 × Astrum BT230 Bluetooth Transmitter & Receiver
1 × USB-C Charging Cable
1 × User Guide