The littleBits random Bit has 2 modes: "noise" and "random voltage." In "noise" mode, it outputs white noise, like a television set not tuned to any channel. In "random voltage" mode, it outputs random voltage signals that make oscillators play random pitches.
Use the "trigger out" connector and "speed" dial of the micro sequencer to set the timing of the random output pulses and use an input Bit like a dimmer to control the range of your random outputs. In random voltage mode, the Bit needs to receive a "clock" signal to change its voltage output. This could be from a Bit like the pulse, micro sequencer, or button.