A power supply is necessary if you are going to use more than 4 cards in a single shelf of your base station. AC supply range ~ 100 to 240 AC (50/60Hz). Buyers should check local currency ranges to check power source compatibility. If more than two AC adapters are used they must be kept on a flat surface.

• Secondary power supply if more than 4 cards are used in a single shelf rack
• Compatible with AC power supply ~100 to 240 AC (50/60Hz)
• Must be stored at temperatures below 32ºC, and have free air surrounding the PSU.