... system CE RF Recorder,Time recorder,PDA. To collect all the open door recorder,include who,at what ... with the software control,the whole system include:Hotel RF Card lock,RF card,RF Encoder,software ,RF Recorder ... lock,open door card,RF Encoder,software,RF Recorder,and the Energy saving switch. Working theorySoftware ... . 5 (or No. 7) AA batteries, with lack of voltage indications. Static Power Supply 1u ...