Portable subwoofer noise-cancelling Bluetooth speaker

Portable subwoofer noise-cancelling Bluetooth speaker
Connection method: Bluetooth connection
Frequency response range: 60Hz – 15KHz
Signal-to-noise ratio: ≥ 75dB
Number of speakers: 1
Box material: Metal
Power supply method: USB
Waterproof rating: IPX 2
Bluetooth version: 5.0
Built-in battery capacity: 300mAh – 500mAh (inclusive)