Key SpecificationsConnection type: Bluetooth3.5mm auxTf/micro sd cardFM radioFrequency response: 70hz-18kSound to noise ratio: >80db channelOutput: 5wBattery capacity: 2000mahFM radio distortion : <1%w1khzVersion : v3.0+edr USBVoltage: dc 5vOperating compatibility: android, apple ios...