Frequency range: 560-590MHz (depending on the specific version) Delay rate: 4.5ms Adjustable channel: 16 adjustable frequency Channel spacing: 0.5-2.5MHz Modulation mode: digital modulation Frequency stability: 3ppm Frequency response: 40Hz-20kHz Working range: 30m (up to 50m in the best environment) Built-in working voltage: 3.7V, 1000mAh lithium battery Color: White Material: plastic Package Contents: 1 x transmitter 1 x receiver 1 x XLR adapter 1 x USB cable 1 x earphone 1 x storage bag 1 x English instruction manual 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.