55dB Maximum Volume Video Wedding Invitations With Smart buttons

55dB Maximum Volume Video Wedding Invitations With Smart buttons Quick Detail: Name:New Design A4,A5 cover size 2.8-10.1nch wedding invitation card,LCD video brochure,LCD video booklet Applications: Advertising and promotion Color:CMYK Printing colors Feature: Battery capacity:600 mAh, 1000 mAh, 1200 mAh and 2000 mAh 1. Product Description for video business card Specifications: Item Description Remarks Function Control Buttons (Available If Required) ON/OFF button 1 When