... could be maintained safely with a stand by Ni-MH rechargeable battery-LED alarm and status indicator-Clock Source ... , PCM30CRC, PCM31, PCM31CRCTest patternRandom pseudocode: 2^15-1, 2^11-1Fixed code: 1111,0000, 1010Alarm indicator ... 1.2V AA Ni-MH rechargeable batteries, for 8-hour contineous test, Built-in smart fast charger, 4.5 charging hoursPower supplyAC/DC adapter, 6*1.2V Ni-MH rechargeable ...