... Introduction This system can be used in apartments,villas,hotels ... display * Can save more than 200 pictures * Mini-USB port, ... - Receiving Frequency - 2.4GHz * Power Source - AC Adapter (100-240V) ... Wireless video door phone, Wireless video door bell, Video door phone, Wireless door phone, wireless doorphone, wireless door bell, wireless video doorphone, wireless video doorbell wireless door bell with ...