Improved version:

• a single electronic board for both surveillance and printout instead of two separate boards
• led already mounted on pcb instead of user needs to mount them on panel with glue

User interface:

• Black round button: toggle surveillance light and sound effect
• Square white illuminated button: red/green/yellow leds animation with sound
• Long press black button: sound on/off
• Long press white button: white button light on/off

In the scope of delivery of this article is included: