Description: We will deliver in bulk and the product iscompatible with can controlled by wifi (DT-06), Bluetooth (HC-06), and PS2 station It is the best choice for robot tank car chassis and robot arm 16 road servo and 4 road motor drive board, using TB6612 4 road drive, PCA9685 for 16 road servo control 16 road servo drive pin, power supply can be switched by external/internal power supply of jumper cap Specification: Product Size: 19 x16.5 x5.7cm/7.48x6.50x2.24inch (L xW x H) Bring out the pin The maximum input voltage of the power supply is 15V/DC Reserve Bluetooth & WIFI module sockets Reserve PS2 handle socket 4 road DC motor drive, single-channel maximum drive current 1.2A average / 3.2A peak Package Includes: WIFI control kit: 1 set Black chassis: 1 set (including 2 motors) Box: 1 piece Socket wrench: 3 pieces Sets of screws: many Acrylic plates: 1 piece