Using an I2C-driven PWM driver with a built-in clock. Unlike the TLC5940 family, you don't need to continuously send signals to attach your microcontroller; It runs completely free! 5V compliant. You can control it from a 3.3V microcontroller and safely drive up to 6V outputs (good for driving white or blue LEDs with 3.4+ forward voltage) With just two pins you can control 16 free PWM outputs - even daisy-chain 62 breakouts to control up to 992 PWM outputs With 4 groups of 3-pin connectors, you can plug in 16 servos at once (servo connectors are slightly wider than 0.1")Resolution 12 bits for each output. Approx 4us of resolution at 60Hz update rate for JZK 16-channel 12-bit servos PWM servo motor IIC module* Very great add-on for making robots, a hexapod walker, or some moving artwork!* Using just two pins, control 16 free PWM outputs!* I2C input, control 16 PWM output, you can control 16 way servo motor.* Frequency: 40-1000Hz.* Channel number: 16 channels.* Resolution: 12 bit.* Tension: DC 5-10V* Size: 6.7 x 2.5 x 1.5cm (LxWxH)* Weight: about 11gPackage includes:* 1 x Motorized Servo Module Note: The data are all manual measurement, please allow 1-3cm error, due to the light and display difference, there will be some color difference, depending on the physical item received.