Home KOLUMAN K1 Headset$53.90PriceColorQuantityAdd to CartProduct InfoBluetooth/TF Card/FM Redio 1,Material: ABS + aluminum alloy+metal 2,Speaker unit: 40mm diameter, speaker power: 32Ω 10mW * 2 3, Bluetooth Specifications: Bluetooth V4.1 JIELI 4,200mAh A grade polymer battery