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Description:Unit Price USD3.25/pc FOB Shenzhen Frequency Response 275hz~20khz Output Power 3W External Power DC3.5V Power Supply 3pcs Battery #7 Battery Life More than 7 hours Audio Frequency Line 30cm Dimension 13*8.5*5cm Carton Size 71*29*58cm Quantity/Carton 50pcs/ctn Net Weight 15kg Gross Weight 18kg Colour optional MOQ 3K Warranty 13 months