Leather Finish - Green, White and Red One Display contains two of each colours Pack Of 6 Batteries Fits with most 510 Cartridges (maximum – 11.5mm) USB-C Cable Included 510 Battery fits upto 2grams Carts Voltages: Green – 3.0V Red – 3.8V Rainbow – Preheat Instruction: press button 5 times to power on/off device. press button 3 times to adjust voltage. press button 2 times to preheat.