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 recording and playback (above onvif version 2.4.2). 4: microsd card: supports up to 128gb microsd card for recording and playback. 5: alarm: supports motion detection alarm, phone push alarm and email alarm. 6: pc client software: "sricampc" supports 1-, 4-, 6-, 8-, 9, 16-channel ip camera centralized monitor, record and playback.