RioRand Upgraded 0.5W Long Range (10km) Dual Mode Stereo Broadcast Home FM Transmitter with Antenna Powered by RioRand advanced technology Power adjustable: 100mW and 500mW power can be switched to use; Real work of the whole band 76M ~ 108M frequency range can be set, such as 86M ~ 90M, 95M ~ 108M, 87M ~ 108M Excellent heat dissipation, power stability, stereo sound quality in its class enables you to be satisfied