Rechargeable Electric Wine Aerator & Dispenser come with rechargeble usb cord.      - Install the extension tube onto the dispenser and adjust it to suitable length.      - Insert the dispenser into the bottleneck and choose to switch on/off the aerator valve for aeration function according to needs.        - Place a wine glass and hold the dispenser spout, press and hold the button on the top of the product, the wine flows smoothly through the pouring channel into the glass. Release the button when finishing pouring