Yes, it most certainly does! On the right side of the stompbox there’s a high impedance (Hi-Z) instrument input jack to connect instruments, and other unbalanced signals. There’s also a GAIN button that changes the total gain range of the Input Gain knob by ~22dB.
Button In = LO gain. Line level signals (keyboards, bass).
Button Out = HI gain. Microphones, electric guitars and other low output instruments.