[2.4GHz Wireless IEM System]M7-S wireless in-ear monitor system adopts 2.4G wireless transmission, with lossless sound quality, low noise/lowlatency. One-Key to change mono/stereo input, providing smooth frequency response with any earphones. [Long Battery Life]Built in Rechargeable Lithium Battery, it can last up to 12 hours per use after a full charge, make suring your show is complete and perfect Less than 12ms Latency. [One to More]One wireless transmitter can be paired with multiple receivers to send signals. The wireless transmittion distance is 90 feet, perfect for small/medium stage performance and daily band practice.2.4G wireless technology,low delay, no compression; [Support stereo and mono] Connectivity technology: Wireless, Wired, Headphone jack: 3.5 mm Jack, Transmitter: 3.5mm Jack [Unique Collar Clip Design]The clip design makes it easy to clip on your pack pocket or clothes. It's small and cute and not easy to fall off, allowing you to fully immerse yourself in the world of music without any worries. Colour:Black Material:plastic Package Contents: 1 x Wireless Transmitter 1 x Wireless Receiver 1 x Headphone 1 x USB Cable Only 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.