The ZC95 is a DIY four channel EStim box with similar form factor & output design to the MK312-BT (which in turn is a clone of the ET-312B).Unlike the 312B, it uses 2x Raspberry Pico microcontrollers instead of an ATMEGA16, and the firmware is open source and mostly written in C++.

The box can be controlled remotely via a Python GUI, and run Lua scripts uploaded to it, either using RS232 serial or WiFi if a Pico-W is used for the main MCU.

Compared to an MK312-BT, it has 2 extra channels, two trigger inputs (think predicament bondage), and an accessory port. It has limited bluetooth support (remotes only) and, so far, is missing most of the patterns of the 312. Audio input is possible with an extra/optional board.

Additionally, if a 433MHz transmitter is fitted it can be used to control certain types of shock collars from some patterns.