... ,light 3:Support:mp3,wma tf card, usb sport earphone tf card,usb sport earphone Specification:1) Bluetooth version: V2.1 +EDR , class II2) Chipset ... order to prolong the battery life ,please power off the earphone and use the specialized equipment.2:If it’s your ... put the earphone in the place that the temperature is higher than 45 degree.Pictures tf card, usb sport earphone tf card,usb sport earphone