So you would like to add Bluetooth functionality to your TV and other devices? This Avantree Bluetooth Transmitter & Receiver has you covered. It is a low latency solution for your TV, headphones, and speakers. The transmitter has a range of 10 meters and works up to 6 hours on battery.
The RX unit can work for up to 8.5 hours. Both the receiver and transmitter weigh about 20g. Sets you back under $50 at this time.