TWo-WAY VOICE TALK - High-definition pixel doorbell, video calling, Voice changer. REMOTE CONTROL - Two-way voice calls, clear answers in real time, The visitor and the host are face to face, Let you at home at ease, go out at ease. INFRARED NIGHT VISION - Not lose any details even in darkness. VOICE CHANGER INTERCOM - Protect the true identity of girls and children, and safer. RANGE UP TO 150M - Penetration distance 30-50M, Open distance 100-150M. It is recommended to installon both sides of the door. It is forbidden to install the doorbellon the iron door, affecting the signal. FREE CLOUD STORAGE - Unlimited storage in the cloud, ready to view at any time. IP65 WATERPROOF AND DUSTPROOF - It works both indoors and out. 800mAh Lithium Battery - use for about 3 months and charge time only 1.5 hours. Colour:Black Material:Plastic Package Contents: 1 * Tuya WiFi Video Doorbell Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.