1. OSPL90: less than or equal to132dB
\n2. High frequency average OSPL90:120dB
\n3. Full gear sound gain: 35dB\u00b15dB
\n4. Equivalent input noise: less than or equal to29dB
\n5. Working current: 10mA
\n6. Frequency range (not narrower than) : 300Hz to 4500Hz
\n7. Battery capacity: 30mah
\n8. Battery type: Rechargeable polymer lithium-ion battery 3.7V
\n9. Ergonomic design ear hook, comfortable to wear, ear will not hurt
\n10. Adopt digital signal processing technology, adapt to a variety of auditory environment, present natural sound quality, let the sound clear transmission
\n11. One key noise reduction technology, easy to feel the natural sound
\n12. Three modes can be switched freely
\n13. USB charging design, rechargeable, blue light when charging, green light when fully charged
\n14. Cycle charging, built-in lithium polymer battery, durable endurance, long service time
\n15. One-button switch\/mode switch. Long press is switch on and off, short press is mode switch
\n16. Small body, hidden in the back of the ear, easy to wear, easy to take off
\n17. Intelligent noise reduction processing chip, double noise reduction, analysis and remove all kinds of noise
\n18. Anti – sweat and anti – fall, durable
\n19. Size: 3.48×1.7×0.85cm
\n20. Weight: 4g<\/p>\n
21.EN-T201A Skin Color, EN-T201A Metal Blue, EN-T201A Black<\/p>\n