TECH-PROTECT ULTRABOOST AU03 Bluetooth 6.0 Audio Adapter AUX Receiver Black

Experience wireless audio freedom with Bluetooth 6.0 technology, delivering a stable connection up to 10 meters and up to 10 hours of playback on a single charge. The TECH-PROTECT ULTRABOOST AU03 turns any wired audio system into a Bluetooth receiver, letting you stream music from your smartphone, tablet, or laptop to your car stereo, home speakers, or headphones without cables.

Overview

The ULTRABOOST AU03 is a compact Bluetooth audio adapter that plugs into any 3.5mm AUX input. It pairs automatically with your device and reconnects instantly when in range. A built-in microphone enables hands-free calling, while multi-function buttons let you control playback, volume, and calls directly from the adapter. The rechargeable lithium-ion battery charges via USB-C in about 1.5–2 hours, and an LED indicator shows pairing and battery status.

What stands out

• Bluetooth 6.0 for faster pairing, lower latency, and improved energy efficiency
• Universal 3.5mm AUX output works with car audio, home stereos, wired headphones, and speakers
• Built-in microphone for clear hands-free calls
• Multi-function button with volume and track controls
• Up to 10 hours of continuous playback
• USB-C charging for modern convenience
• Automatic reconnection to last paired device

Technical details

• Bluetooth version: 6.0
• Wireless range: up to 10 m (33 ft)
• Audio output: 3.5 mm jack (AUX)
• Power input: USB-C, DC 5V
• Battery: built-in rechargeable lithium-ion
• Playback time: up to 8–10 hours
• Charging time: approx. 1.5–2 hours
• Supported codec: SBC
• Material: ABS plastic
• Colour: black

Our verdict

The TECH-PROTECT ULTRABOOST AU03 is a reliable and affordable way to add Bluetooth to any audio system. Its long battery life, easy controls, and hands-free capability make it a versatile companion for car and home use. Whether you're upgrading an older stereo or adding wireless convenience to your wired headphones, this adapter delivers solid performance in a compact package.