The new outlook design and latest technology 2.4G stereo HI-Fi wireless headphones.New enjoy of beautiful sound.The transmit rate is 1:1. Adapt digital circuit and imported chip,strong interfference resistance,high fidelity, the transmit distance is up to 20 meters without obstacle.Can continue to use 12 hours by rechargeable lithium battery. Specification: 1.Frequency range:2.4-2.5GHz 2.Frequency response:20HZ-20000Hz 3.Modulation mode:GMSK 4.Separation:>70dB 5.Dynamic range:88dB 6.THD<0.5% 7.S/N ration:95dB 8.Receive sensitivity:-83dBm 9.Transmitting distance:20meters without obstacle and interference