If you encounter any issues while using our product, please download the manual corresponding to your product model. 

VT01_BK_GY / VT02-200F/ VT02_20F_25F_42F_50F_65F / VT03

VT03-170C/ VT04/ VT06/ VT07

VT08-K01C/ VT08-K01E/ VT08-KN02E/ VT1136/ VTH100_VTH200

If the manual does not resolve the issue, kindly provide a screenshot of your purchase record (including the order number). We will use your order number to identify your product model and offer you the most accurate and high-quality support!