The Silk'n Jewel has five power settings that work with the automated pulse system. Each power level links to the frequency of the Home Pulsed Light (HPL). Level 1 is the lowest power level of HPL and is suitable for using on your skin after tanning. It gives off one light pulse per second. This is the fastest level. The higher the power level, the more effective your hair removal treatment is. Setting the Silk'n Jewel to level 5 means the device will give off one light pulse every 3.5 seconds. For the best result, this is the recommended setting. Boasting over 150,000 light pulses, the Silk'n Jewel can work on multiple areas like your bikini line or underarms, and has a treatment area of 3 cm. With this many light pulses, you don't have the expense of replacement cartridges.