The Axygen Power Supplies are full-featured power sources ideal for molecular biology workflows including DNA and protein gel applications. The compact user interface has 4 sets of color-coded terminals allowing for use with up to 4 gel boxes simultaneously. Depending on the model, operating modes include constant voltage, current, or power all with automatic crossover feature. The PS250HA has the ability to set programs with 10 steps per program. Both units have timers.