Dear Sir/Madam, I'm looking for products with the following specifications: 12V/500W, 12V/1000W, 12V/1500W and 12V/2000W inverter in huge quantity with below features: Efficiency at least 85%. Protection (thermal-short circuit-over load- inverse polarity). USB ports. Clips. Outside fuses. Big transistor. Heat sink. Please send us relative product list with picture, price in RMB and quantity for each item. Show More