A neurostimulator device for use with groups (e.g., more than four groups) of electrodes. The neurostimulator may include a stimulation assembly configured to deliver different stimulation to each of the groups. The neurostimulator may also include at least one processor configured to direct the stimulation assembly to deliver stimulation to the groups. The stimulation delivered to at least one of the groups may include one or more waveform shapes other than a square or rectangular wave shape. The processor may receive data from one or more sensors and use that data to modify the stimulation delivered. The neurostimulator may be configured to communicate with an external computing device. The neurostimulator may send data to and/or receive data and/or instructions from the computing device. The computing device may use information collected by one or more sensors to at least partially determine stimulation parameters to communicate to the neurostimulator.