High definition clear video with 90 degrees viewing angle, display the details in front of your door,reliable and practical. Record important moments, no longer have to worry about losing your delivery, the elderly and children are no longer afraid of being alone at home. WIFI connection, no wire needs, achieve a two way intercoms between the doorbell and mobile phone.Real-time mobile phone, support two-way calls, photos, recording, caring for your family makes you more secure. Disassembly free cycle charging. The Doorbell can be video call by APP,and view the captured pictures by APP,Start work after ringing the bell, intelligent and portable. 2.9" L x 1.88"W x 0.62"H