4 inç TFT Renkli Ekran Video İç Mekan Dahili Telefon Sistemi (ME)

1. 4 inch TFT color screen or Black-and-white CRT;
2. Two-way talkback with Management center and outdoor host;
3. High quality voice channel;
4. Function: Post information, alarm, monitor;
5. Hands-free speaker function;
6. Many kinds of bell ring;
7. The brightness and color of image can be adjustable;