30-50m pickup distance Clear Audio Three modes of adjustment 16 sets of frequency points available for automatic frequency matching upon startup Multiple device connections Frequency range: 500-980MHz Frequency stability: ± 3PPM Adjustable channel: 16 adjustable frequency points Frequency response: 40Hz-20KHZ Channel spacing: 0.5-2.5MHz Scope of work: 50-8M Modulation method: DQPSK Working voltage: built-in 3.7V, 14500 lithium battery Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:black Material:ABS Package Contents: 1 x transmitter 1 x receiver 1 x 6.35 converter 1 x charging 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.