aux Bluetooth audio receiver/transmitter / dual mode free switching

The HOCO Graceful E151 Bluetooth 5.4 Audio Adapter is a highly versatile, 2-in-1 wireless transmitter and receiver designed to add wireless capabilities to standard 3.5mm AUX audio systems
Key Technical Specifications
Bluetooth Version: Advanced Bluetooth 5.4 (JL AC6956C chip) for stable, low-latency playback.
Dual Operating Modes:RX (Receiver Mode): Stream music wirelessly from your phone or tablet to wired car stereos, speakers, or headphones.TX (Transmitter Mode): Send audio wirelessly from non-Bluetooth devices (like TVs or PCs) to your Bluetooth headphones or earbuds.
Battery Life: Built-in 150mAh rechargeable battery.Up to 7 hours of continuous use in receiver mode.Up to 4 hours of continuous use in transmitter mode.Standby time up to 200 hours.
Charging: Fully recharges in approximately 2 hours via a modern USB-C port.
Hands-free Calling: Includes an integrated microphone for taking wireless phone calls safely while driving.
Ultra-Compact Design: Weighs just 10 grams, making it highly portable and discreet.