Mainboard: ELF mini V2.1 Operating Voltage: 3-6V (3.7V Lithium battery included, 4 blue LED power indicator) On-board Sensor: Light Sensor, Sound Sensor, IR, RGB LED, Buzzer. External Sensor: RGB Ultrasonic Sensor, Double-way Line-following Sensor, 5*14 LED Matrix Panel Communication: Bluetooth, IR Switch: 1 xTouch switch (turn on/off robot when toggle switch is off) 1 xToggle switch (keep robot turned on when toggle switch is on) APP: WEEEMAKE (IOS & Android) Program Software: WeeeCode (Scratch 2.0 &3.0), Arduino IDE.

Mainboard: ELF mini V1 Operating Voltage: 6-10V (6 AA battery, not included) On-board Sensor: Light Sensor, Sound Sensor, IR, RGB LED, Buzzer. External Sensor: RGB IR Avoid Sensor, Single-way Line-following Sensor, 5*14 LED Matrix Panel Communication: Bluetooth, IR APP: WEEEMAKE (IOS & Android) Program Software: WeeeCode (Scratch 2.0 &3.0),

Mainboard: ELF Operating Voltage:6-12V/TT Motor*2/RGB Ultrasonic Sensor,Line Following sensor,Light sensor、Infrared sensor,sound sensor,Onboard button,Buzzer,RGB LED/Scartch3.0-&Arduino/Packing box Communication: Bluetooth, IR APP: WEEEMAKE (IOS & Android) Program Software: WeeeCode (Scratch 2.0 &3.0), Arduino IDE. Power: 2x18650 Lithium battery (included)

Mainboard: ELF Operating Voltage:6-12V/TT Motor*2/RGB Ultrasonic Sensor,Line Following sensor, LED matrix panel - 7*21, Light sensor,Infrared sensor,sound sensor,Onboard button,Buzzer,RGB LED/Scartch3.0-&Arduino/Packing box Communication: Bluetooth, IR APP: WEEEMAKE (IOS & Android) Program Software: WeeeCode (Scratch 2.0 &3.0), Arduino IDE. Power: 2x18650 Lithium battery (included)

Crank and Rocker Mechanism Double-rocker Mechanism Generator Meshing Belt Driving Mechanism Music Robot Oscillating and Reciprocating Mechanism Slider-crank Mechanism Ultrasonic Guitar Ultrasonic Radar

Mainboard: ELF Operating Voltage:6-12V/TT Motor*2/RGB Ultrasonic Sensor,Line Following sensor, sound sensor, Infrared sensor, Onboard button, Buzzer,RGB LED/Scartch3.0-&Arduino/Packing box Communication: Bluetooth, IR APP: WEEEMAKE (IOS & Android) Program Software: WeeeCode (Scratch 2.0 &3.0), Arduino IDE. Power: 2x18650 Lithium battery (included)