This electronic lock mechanism was originally used for sharing bicycles. Inside is a metal gear reduction motor that drives the rack to push the metal rod to expand (replace the positive and negative poles of the motor power to change the expansion), and there is a travel switch to sense the travel position. Good quality, great for DIY.
Suitable for wide voltage: DC 1.5V-6V are easy to use, the higher the voltage, the faster the expansion and the greater the strength.
[Weight] 66 grams