1. Touch Control Ignition - After turning on the lighter cover, just touch the function you want to activate and touch the coil button to work properly. You can touch the fingerprint sensor and light the top circle so you can ignite the cigarette from both sides2. USB charging - just use the USB cable to charge. It takes 1 hour to fully charge and more than 3 hours. Since this lighter is USB rechargeable, you can use your laptop, mobile power, etc. to charge according to your needs. This smart lighter is energy efficient and can serve you for a long time.