Brand: Astrum SKU: A85023-B Manufacturer Product Code: BT230 Product Overview The Astrum BT230 2‑in‑1 Bluetooth Transceiver upgrades any wired audio device to wireless freedom. With TX mode, transmit audio from TVs, laptops, or airplane screens to Bluetooth headphones. With RX mode, receive music wirelessly on car stereos, speakers, or amplifiers. Featuring Bluetooth 5.3, dual pairing, USB‑C fast charging, and a built‑in microphone, it’s the ultimate portable audio solution. The LED display shows connection status, battery, and mode, while the zinc alloy body ensures durability in a sleek, compact design. Key Features 2‑in‑1 TX/RX mode: transmit or receive Bluetooth audio on any 3.5mm AUX device Hands‑free calling with built‑in microphone Fast USB‑C charging: full recharge in 45 minutes LED display for Bluetooth mode, pairing, and battery status Dual pairing support for two Bluetooth devices simultaneously Universal compatibility: TVs, PCs, car stereos, airplane systems, headphones Compact zinc alloy body, lightweight at only 15g Long battery life: up to 5.4h in RX mode, 2h in TX mode, 6‑month standby Easy control buttons for volume, track change, and call handling Technical Specifications Wireless BT: V5.3 Bluetooth Range: Up to 10m Battery Capacity: 120mAh Charging Time: 45 minutes (USB‑C) Working Time: RX: 5.4h / TX: 2h Standby Time: Up to 6 months Input/Output: 3.5mm AUX Power Input: Type‑C USB Material: Zinc Alloy Body Dimensions: 51.5 × 23 × 13.6 mm Weight: 15g Warranty: 12 Months What’s in the Box 1 × Astrum BT230 Bluetooth Transceiver 1 × USB‑C Charging Cable 1 × User Manual