Reverse charging for the buds is an amazing concept. IMAGING/SOUNDSTAGE: The SHP9500 has good imaging. Operation is very easy just plug into your device and play. After our dog chewed my sons crocs I jumped online to replace them and that?s when I came across these. definatley a good workout I was able to answer the call the the call quality was awful. La duración de batería aun no he podido probar las 4 horas, no suelo escuchar tanto tiempo, pero tras 2h el movil me indica que están al 50%. My feet are slightly narrow. They are study, comfortable, and look good for the price. Sometimes the audio even cut out when my phone was in my pocket.