Features:1. Adds wireless audio connectivity to any active loudspeaker2. Connect your audio source to The transmitter and it sends the signal to your receivers3. No compromise in audio quality;4. Adjustable squelch eliminates interference5. Perfect for multi-room venues, weddings, mobile DJ's, tricky floor monitor placement and mobile A/V6.Matters needing attention:(6.1)Ultra-high frequency, no delay;(6.2)Mono, with a focus on midrange sound;(6.3)Listening to music is not a suitable purpose;Working Status:(TX) Transmitter introduction1. Green Light at work.2. The flashing Blue Light indicates a small amount of electricity3. Charging blue light flashes,The blue light stays on when the battery is fully charged(RX) Receiver introduction1. Green Light at work2. Signal disconnect Red Light3. The flashing Blue Light indicates a small amount of electricity4. Charging blue light flashes,The blue light stays on when the battery is fully charged