... . Signal-to-Noise Radio> 50db6. Distortion < 2% THD7. Speaker : 40mm mylar8. Frequency Response: 20-20000Hz9. Transmission Frequency : ... Carton size: 41*44*46 cmInformation:1. Good quality wireless bluetooth headphone2. Clear voice3. With safety package4. Colors available5. ... Housing, Battery, Charger, Earphone, Bluetooth handset, protector case, Memory card, USB cable, speaker, MP3, Unlock and so on. ...