Knock-knock with built-in box. Knock correct pattern.

#escaperoomidea #ecodecor #escaperoomgadget
Products page in our store - www.er-ecodecor.com/product-p...
There is а box (20*10*10cm) with electronics inside. On the box there is indicator (it corresponds with knocks)
Players should knock correct pattern of knocks (i.e. 4-3-3-1). After that external mag.lock will open.
Option "built-in box" available.
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