Tech-Protect Ultraboost AU02 Bluetooth 5.4 audio adapter with AUX, black

The Tech-Protect Ultraboost AU02 is a Bluetooth 5.4 audio adapter with a 3.5 mm AUX connection that works both as a receiver (RX) and as a transmitter (TX). You pick the mode with a switch on the unit, so one device does the job of two. It adds Bluetooth to equipment that has none.

In RX mode the adapter receives audio from your phone or tablet and passes it over AUX to a car radio, speaker or sound system. The built-in microphone lets you take hands-free calls in the car; it works in RX mode only.

In TX mode the adapter sends audio from a TV, computer or projector with an AUX output to wireless Bluetooth headphones or speakers.

The connection holds at up to 15 m. The built-in 180 mAh battery gives up to 5 h of music or calls and up to 100 h on standby. Charging over USB-C takes about 2.5 h. The adapter weighs 12 g and is small enough to carry with you every day.

Technical data

• Model: AU02
• Bluetooth: 5.4
• Modes: RX (receiver) / TX (transmitter)
• Audio connection: AUX 3.5 mm
• Range: up to 15 m
• Microphone: yes, RX mode only
• Battery: 180 mAh
• Operating time: up to 5 h (music or calls)
• Standby time: up to 100 h
• Charging time: about 2.5 h
• Charging port: USB-C
• Dimensions: 100 x 22 x 13 mm
• Weight: 12 g
• Colour: black