... : FM: 76 -108MHZ4, Excellent tone quality, with wallyson dual channel stereo.5, Dual power supply, built-in rechargeable lithium battery and USB power6 ... : FM: 76 -108MHZ4, Excellent tone quality, with wallyson dual channel stereo.5, Dual power supply, built-in rechargeable lithium battery and USB power6 ...