Product parameters:Bluetooth specification: Bluetooth 4.2TG-125patentWireless transmission range: 10MBluetooth connectionBattery capacity: 1200mAhAudio inputBuilt-in voltage: 3.7VFM radioPlay time: 4 ~ 6HMicro SD card direct readingSpeaker specifications: p 57mm x2U disk direct readingSpeaker power: 4Q / 5Wx2MINI Micro USB chargingDimensions: 94.8x98.7x220mmOne-click answering of Bluetooth incoming callsBuilt-in lithium battery