plug&play microphone for iphone, boya by-wm3d 2.4ghz wireless microphone with mfi certified ios adapter, 3.5mm trs & trrs adapter & charging case compatible with iphone ios device, dslr and camcorder boya <p><b>specifications</b></p> <p>transmission type: 2.4ghz </p> <p> </p> <p> polar pattern: omnidirectional </p> <p> frequency response: 20hz-20khz (±3db) </p> <p> distortion: <0.1% </p> <p> sampling rates: 48khz </p> <p> bit depth: 16bit </p> <p> signal-to noise ratio: 75db or more </p> <p> sensitivity: -42db±3db (1db=1v/pa@1khz) </p> <p> operating distance: 20m(without obstacle) </p> <p> power consumption: tx: 80mw rx: 60mw </p> <p> working time: tx: 4.5 hours * two times rx: 8 hours * two times </p> <p> charing time: tx:2 hours rx:2 hours charging case:2 hours </p> <p> charging port(charging case): type-c </p> <p> battery capacity: tx:100ma rx:100ma charging case:1000ma </p> <p> size: charging case:120*77*30.5m(4.7*3*1.2") tx:51.8*15.6*18mm(2*0.6*0.7") rx:54*15.6*15.6mm(2*0.6*0.6") </p> <p> weight: tx+rx+charging case: 129g (4.5 oz) tx:10.5g (0. 37 oz) rx:9.5g (0. 33 oz)</p> <p><b>packling lists</b></p> <p> </p> <p> charging case clip-on minature transmitter</p> <p> professional compact receiver</p> <p> mfi certified lightning adapter</p> <p> 3.5mm trs adapter</p> <p> 3.5mm trrs adapter</p> <p> foam windshield</p> <p> fur windscreen</p> <p> 30cm/11.8"type-c to usb-a charging cable</p>