Wireless Ring Doorbell WiFi 2-Way Intercom Night Vision Video Camera Door Bell ~
Doorbell product size (mm) : 91x52.5X26mm. Voice intercom :3m. Try to choose the location with good network conditions to install the doorbell. WIFI mode: 2.4GHz 802.11b/g. Jingle Jack: USB port. Jingle frequency: 433.92MHZ.