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: microsd card: supports up to 128gb microsd card for recording and playback. 5: alarm: supports motion detection alarm, phone push alarm, email alarm, whistle alarm and wi-fi detector linkage alarm(such as: smoke detector, pir, door sensor, etc. Work with up to 64-channel 433hz wi-fi detector) 6: pc client software: "sricampc" supports 1-, 4-, 6-, 8-, 9, 16-channel ip camera centralized monitor, record and playback.