Welcome to Donnerdeal!
1. High-quality tone, ultra short delay, less than 2.5ms Latency, easy to use, plug and play.
2. Uncompressed wireless transmitting, the transmission distance is more than 200 feet range.
3. Rechargeable lithium battery, 4.5 hours of battery life, and with USB port for charging.
4. Supports 4 sets of devices working at the same time, o...