Astrum BT300 Bluetooth 5.3 Audio Adapter

Brand: Astrum
Product Code: A85030‑B
Description: Multi‑Device Wireless Audio Transmitter & Receiver, AUX – BT300

Product Overview
The Astrum BT300 is a versatile 2‑in‑1 Bluetooth 5.3 transceiver that transforms any wired setup into a wireless experience. Use it in TX mode to stream audio from TVs, PCs, or gaming consoles to Bluetooth headphones, or switch to RX mode to receive music from smartphones onto wired speakers or car stereos. With dual pairing support, you can connect two devices simultaneously, making it perfect for shared listening or multi‑device setups.

Its built‑in rechargeable battery delivers up to 13 hours of continuous playtime, while USB‑C fast charging ensures quick top‑ups. The BT300 also supports TF cards up to 64GB, features RGB lighting accents, and includes a hands‑free microphone for calls. Compact and lightweight, it’s designed for convenience at home, on the road, or during travel.

Key Features
Dual Mode: Transmit & receive wireless audio
Simultaneous TX Connections: Connect two Bluetooth headphones at once
Multi‑Device Pairing: Easy switching between devices
USB‑C Fast Charging: 2h recharge, up to 13h playtime
Hands‑Free Mic: Clear calls while driving or working
Flexible Inputs: 3.5mm AUX + TF card (up to 64GB)
RGB Lighting + Display: Real‑time status updates
Compact Design: 33g zinc alloy body, portable anywhere
High‑Res Audio Support: MP3 / WMA / WAV / FLAC

Technical Specifications
Feature Details
Bluetooth Version 5.3 (range up to 10m)
Decoding MP3 / WMA / WAV / FLAC
Input Voltage 5V DC
Charging Time ~2 hours (USB‑C)
Working Time RX: 11h / TX: 13h
Dimensions 45 × 45 × 16 mm
Weight 33g
Input/Output 3.5mm AUX, TF card (up to 64GB)

What’s in the Box
1 × Astrum BT300 Bluetooth Transceiver
1 × User Manual