Features: Brand new and high quality Use only two pin, control 16 PWM outputs. Control 16 PWM output, you can control the 16 way Servo motor. The PCA9685 chip is wrap in the center of board. In the 4 groups of 3pin connectors to facilitate the insertion of 16 Servo motor (Servo motor plugging slightly wide than 0.1 ") The external input depends on the 10V 1000uf capacitors. All PWM output line have a 220ohm series resistors protections and can easily drive LED. Specifications: Material:Plastic Frequency: 40-1000Hz Channel number: 16 channel Resolution: 12 bit Voltage: 5-10V Size: 60x25mm/2.36x0.98" Package Includes: 2x PWM Servo Motor Driver Module note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.