Features: / Wireless WIFI video doorbell, information is safer. / Wireless installation, one-click pairing, more convenient installation. / 4.3-inch IPS screen, full-view display, clear and visible. / 2.4G private protocol, long transmission distance, stronger signal. / Video two-way intercom / Indoor unit long plug-in mode, fast response. / The system automatically stores photos and automatically records video when the card is inserted. / 6 Dingdong music switches in the indoor unit. / High-definition night vision: infrared night vision function, LED night vision fill light, no fear of no light environment, can also see in the dark. / Long battery life: built-in 1000 mAh large-capacity lithium battery, doorbell ultra-low power consumption, ultra-long standby, stronger battery life. / Waterproof: outdoor unit IP65 waterproof grade, waterproof cover built-in silicone, easy to deal with rainy environment. / Wide-angle and wide field of view: 170° wide-angle and wide field of view camera, see more comprehensively. Tip: The doorbell can be used without a memory card, but the storage history cannot be reviewed, and other functions are not affected. Specification: Image sensor: GC0328/115 degree ultra-wide angle/white light automatic fill light Display: 4.3-inch IPS screen Recording resolution: 640/480 Battery model: 1000 mAh, permanent battery life 1-3 months Storage card: maximum support 128G/MJEPG format Audio information: built-in speaker, microphone WIFI mode: 2.4G private protocol, transmission distance 1-150 meters Power supply information: DC5V/2A Working temperature: -10/60/ Working humidity: 10/--90/ Waterproof grade: IP65 Installation method: can be punched or fixed with 3m glue Power supply method: outdoor doorbell charging, indoor display USB plug-in Doorbell size: 12.7 / 4.4 / 2.6cm Display size: 11.7 / 9.3 / 1.6cm Packing included: 1 / Doorbell 1 / Display Screen 1 / Data cable 1 / set of Installation accessories 1 / Instruction manual Note: 1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings. 2. Due to the light and screen difference, the item/x27;s color may be slightly different from the pictures. Please understand.