Features: 1: p2p, pnp: plug and play. No need ddns. No need port forwarding setup. 2: sricam app: supports ios, and android smart phones or tablet pcs for remote monitoring. 3: onvif protocol: supports nvr real time monitoring, recording and playback. 4: alarm: supports motion detection alarm, phone push alarm and email alarm. 5: pc client software: "device viewer" supports 1-, 4-, 9-, 16-, 25-, 36-, 64-, 128-channel ip camera centralized monitor, record and playback.