Speakers - Universal - Multifunctional portable watch speaker mini portable wrist sport wireless music center bluetooth subwoofer waterproof speaker | portable speaker (blue) Highlights Universal Multifunctional portable watch speaker mini portable wrist sport wireless music center bluetooth subwoofer waterproof speaker | Portable Speaker (Blue) Multifunctional Portable Speaker Portable Mini Portable Wrist Wireless Music Sports Music Center Subwoofer Bluetooth Waterproof Speaker | Portable Speakers (Blue) Product parameters: RMS: 3W THD: 10% Sensitivity: 83DB SNR: 88DB Power supply: DC5V/500MA Frequency: 120Hz-20kHz Bluetooth: Bluetooth v3.0+EDR Blue color