Portable Bluetooth speaker with wire microphone

Type: Bluetooth speaker Interface Type: USB Frequency range: 100HZ-20KHZ Signal-to-noise ratio: ≥ 75dB Operation method: Button Applicable people: general Box material: Metal Power type: USB Waterproof grade: IPX 2 Built-in battery capacity: 2000 mA-4000 mA Size: 16*9*23 cm