REVO America R165WB4EB4E-2T 16 CH 2 TB DVR Surveillance System with 4 Wireless Bullet Cameras and 4 Wired Bullet Cameras (Black) Connection type: 12 RJ12 / 4 BNC Each camera has a built in microphone for audio monitoring capability Remote Viewing on iOS and Android Smartphones, Tablets, PC & MAC Hard drive: 2TB Resolution: 600 TV lines (Wireless) / 660 TV lines (Wired)