Bluetooth headphone company with 4 years of Bluetooth FunctionFM radio function and TF card insert for wireless musicSpeaker diameter:40mmspeaker impedance32ohmspeaker sensibility108db+/-3dbFrequency response20-20000Hzuse for ipad,mobile phone,computer,etc.playing time:8 hourscolor: 10 colorMEAS:77.5*33*64CM