original f9 tws earphones 9d hifi stereo waterproof in ear headphone bt 5.0 led display wireless earbuds f9-5 f9-5c

.feat1. ergonomically designed, comfortable from the inside out , gentle to each ear 2. clear stereoscopic, sound effects are transmitted synchronously,effectively isolating external noise 3. mini portable charging case, strong power reserve,long-lasting battery life, no worry about going out 4. led power display, more intuitive to know the battery life.hange songs, adjust volume,answer calls, reject calls, hang up calls, play bt, dual earphone call, bt callback, voice prompt,call siri compatible with any device which support v5.0 &v5.1above binaural phone headset..syi