GW15 Convenient wireless bluetooth headphones

GW15 Convenient wireless bluetooth headphones,portable bluetooth earphone,Bluetooth earphone Feature 1.Fit good for Ear 2.Small volume, light weight, Fit for Spor 3.True wireless surround stereo 4.Good sound quality, strong bass,low power consumption 5.Support format:CD,OGG,MP3,ASF,WMA,WA,MP3PRO,RM,REAL,APE,MODULE,MIDI,VQF, AAC Bluetooth version 5 Chip ALT8763 Power input DC 5V. Battery capacity 3.7v,50mAh. Charging box 3.7 V, 450 mah Use time 4 hours. Charging time about 1-2