High quality MINI 503 real 3d TF card individual volume up and down key Ultra UV rubber oil 6-8 hours of FM sound (can be received) quality assurance 

a, functional features

1. Bluetooth function: applicable to any mobile phone for bluetooth connection, music playback, answering and calling functions are supported.  

2. Insert card function: TF memory card is supported. 

3. Radio function: FM

4. Bass effect: this earphone supports a variety of sound adjustment, which can give full play to the sound effect! Beyond your imagination!

5. The shape adopts light and portable sports design, with unique and novel rear hanging wear and design
6. Portable, lightweight and sporty appearance design, sports, leisure and office can be freely listened to
7. Supporting documents: MP3, WMA
8. High quality loudspeaker and sound cavity design to ensure high fidelity and sound quality
9. The volume is continuously adjustable, and the playing state is free to change

Ii. Product specifications and parameters
1. Support system: Windows98/2000/XP
2. USB interface: high-speed USB 2.0; The MP3 headset can be charged and transmitted files
3. Memory capacity: no memory, it is a plug-in card type, with a maximum support of 8GB, TF card /micro sd card
4. Charging power: computer USB port DC 5V; DC 5C(500mA) travel charger; DC 5V(500mA) car charger
4. Battery: DC 3.7v; Rechargeable lithium-ion polymer battery
5. Continuous working hours: about 5 hours; (subject to change in usage)
6. Charging time: about 2-3 hours; (depending on the use of charging equipment); Remember not to charge for more than 3 hours
7. Frequency response: 20Hz -- 20KHz
8. SNR: > 85db
9, working environment temperature: 0 ℃ - 45 ℃