... wireless communications7,Long battery life, two-way power supplySpecification DT-930CPUSH1 (32-bit RISC type)MemoryRAM4 MB (User ... as standardPowerOperationAA-size alkaline battery (2 pcs) or DT-923LIB lithium-ion battery packMemory backupLithium battery (CR2032) ... Battery capacity540 mAh (DT-923LIB)Operating periodWith AA-size batteries: Approx. 200 ...