This product uses advanced chip technology developed by PWM, have the real achievement of smaller, lighter, quicker and high conversion efficiency. This product is designed to protect the electrical and automotive circuits in use. Output interface meet the nation standard plug. 300 W and 500 W power inverter increase USB 5V output charger socket which can charge MP3, digital cameras, cell phones using this port. This USB 500W power Inverter can be operated with your Car Cigarette socket or direct connected with wires clips. So what are you waiting for? Get your hands on this product now! You can buy this product online in Pakistan, exclusively from Homeshopping.pk