Features: You want to make a robot When we saw this chip we quickly realized what an excellent add-on this would be. Using only two pins control 16 free-running PWM outputs! I2C input control 16 PWM output you can control the 16 way servo motor. Specifications: Frequency: 40-1000Hz. Channel number: 16 channel. Resolution: 12 bit. Voltage: DC 5-10V Size: 60*25mm Color: blue Net Weight: 12 g Package Included: 1* 16-Channel 12-bit PWM Servo motor Driver I2C Module