Dual analog ADSR envelope generator

2ADSR module contains two ADSR type envelope generators, which can be started simultaneously or separately.
Each ADSR provides these controls and in/outputs:
ADSR pots (Attack, Decay, Sustain, Release).
Gate input.
Double envelope output and inverted output.
Reset input.
3-position time range toggle switch.
Envelope indication.

https://catoffsystems.com/2ADSR/