Alarm Clock Bluetooth Speaker High Power Waterproof Portable Column for PC Computer Speakers Subwoofer Box Music Center FM Technical Parameters Product size: about 14x3.5x6.5cm Product color: black, pink, red, white Speaker unit: single speaker Output power: 3w Battery capacity: 1200mAh Signal to noise ratio: 75db Frequency response range: 60Hz-15KHz Transmission distance: 10 meters Expansion storage: 32GB Support function: insert card, call function Bluetooth protocol: 4.2 Function: insert card, alarm clock Playing time: 6 hours Operation mode: button Connection method: 3.5mm audio jack, Bluetooth connection Support format: AUX, FM, TF, BT, ALM Power supply mode: built-in lithium battery Package includes 1pc Bluetooth speaker 1pc USB charging cable