The microphone frequency is variable frequency, with multiple sets of adjustable frequency points. Multiple sets can be used at the same time without -frequency. Compatible with devices: microphone/MIC/microphone device, plug and play. Standard 6.35 plug, good versatility, suitable for more audio equipment No need for cumbersome settings, it can automatically connect when you turn it on, one-click frequency binding, plug and play Long-distance reception: frequency band/good anti-interference performance, stable long-distance transmission signal, loud sound/clear sound quality Specification: One to two Color: black Material: ABS Package Contents: 1 x receiver 2 x lavalier microphones 2 x microphone magic straps 1 x charging cable 1 x 6.35 adapter 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.