Tuya WiFi HD Video Smart Doorbell 
◆TuyaSmart Low Power WiFi HD Video Doorbell
◆ APP name:TuyaSmart
◆ 1/4 CMOS 720P Sensor;
◆ Standard Lens: 2.8mm;
◆ H.264 Real time;
◆ Two-way audio & IR Cut;
◆ Suport PIR motion detection;
◆ Suport Android & Iphone Mobile View;
◆ Night vision distance: 3-5M;
◆ Power supply:2*18650 rechargeable batteries;