Sound quality of the product is very good
• impedance: 32 ohm
• bluetooth version: bluetooth v4.1 + edr
• bluetooth use band: 2.4ghz
• power level: class ii
• frequency response: 20-20000hz
• operating voltage range: 3.0v-4.2v
• mitou sensitivity: -42db
• with a2dp / avrcp high quality stereo audio transmission and remote control protocol
• powerful noise de-noising circuit (active noise reduction)
• charging time about 1 hour (power indicator charging: red light, full power: red light off (blue light).)
• product net weight of about 5g
• talk time is about 3-4 hours
• music time about 2-3 hours
• standby time is about 120 hours
• the charging time is about 60 minut