Feature: Easy to pair with various FM support devices, such as loudspeakers, amplifiers, FM radios and automotive audio systems. Large screen display frequency and volume. The volume of the speaker can be adjusted remotely on the microphone. The built-in rechargeable lithium-ion polymer batteries can support up to 10 hours of use after full charging and are environmentally friendly for long-term use. Long FM wireless transmission distance of up to 15 meters , available channels of up to 225 with no signal interference,Transmission frequency: 87.0 Mhz to 108Mhz. Widely compatible for teaching , tour guid, sale , speech , conference , karaoke and more.
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