... : compatible with MP3, WMA, WAV formats Frequency range of receiver : 76-108MHz Charging time: 2.5 hours. Cheap plug card ... headphone with blister card packing Product Instruction: Power indicatorPower ON ... buttonPlay/Pause buttonNext buttonTF Card.Technical specificationAudio mode: compatible with MP3, WMA, WAV formatsFrequency range of receiver : 76 ...