Features Multi-purpose function: - Obstacle avoidance - Line follow - IR remote control - Bluetooth control - ultrasonic follow - displayed face emoticons. Simple assembly: No soldering circuit required, complete assembly easily. High Tenacity: Aluminum alloy bracket, metal motors, high quality wheels and tracks High extension: expand other sensors and modules through motor driver shield and sensor shield Multiple controls: IR remote control, App control(iOS and Android system) Basic programming:C language code of Arduino IDE Specification: Working voltage: 5v Input voltage: 7-12V Maximum output current: 2A Maximum power dissipation: 25W (T=75℃) Motor speed: 5V 63 rpm/min Motor drive mode: dual H bridge drive Ultrasonic induction angle: lt;15 degrees Ultrasonic detection distance: 2cm-400cm Infrared remote control distance: 10M (measured) Bluetooth-compatible remote control distance: 50M(measured) Bluetooth-compatible control: support Android and iOS system