YMMV coupon! Amazon with Mizinn has the SoundSync Pro Bluetooth Transmitter & Receiver (Can pair 2 Bluetooth Devices) on sale for $50 - 50% off coupon (click checkbox) = $25 with free shipping on $35+ or with Prime.

• Up to 10 hours of battery life (USB-C charging), Supports TX and RX modes,
• Volume control buttons, Qualcomm Chipset (40ms latency)