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, 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) to music is not a suitable ;Working Status:(TX) Transmitter introduction1. Green Light at work.2.Power is insufficient, not remind,automatic shutdown3. Charging blue light on, full blue light off4. TX transmitter out of power after automatic shutdown, when charging will still be in the working state. stop charging after 1 of charging and turn off the transmitter TX working state charging, otherwise the battery will not be saturated with charging. We are improving the , this is not a quality problem, to use.() Receiver introduction1. Green Light at work2. Signal disconnect Red Light3. The flashing Blue Light indicates a small amountof electricity4. Charging blue light flashes,The blue light stays on when the battery is fully size: 70 x 26 x 19mmMaterial: plasticcolour: blackPackage Contents:1 x transmitter,1 x receiver,1 x charging cable,2 x connecting wires1 x storage bagOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.