Two-way Audio & Voice Meage:When visitor pre doorbell,notification will sent to your cellphone, you can answer it and enter video call interface.The video doorbell provides you real-time clear two-way audio, you can see, hear and talk with the visitors immediately through phone APP.Voice change function:Voice change function with man voice at home children and women get safer when alone.Auto capture at the same time and save image in cloud,you can review visiting records in app.1080P Full HD & Night Vision:Video doorbell camera offers you crystal-clear images and video recordings. Intelligent IR-CUT automatically senses the ambient light and switch to night vision mode. Built-in IR-lights permit you to see clearly even in darkne. High definition clear video with 65 viewing angle, Better safeguard your family and property!Disaembly free cycle charging: Built-in 800MAH lithium ion long standby rechargeable battery high-capacity battery, more than 6 months of normal use,Charging time 1.5 hours.the installation and the connection of security camera are 100% wirele, makes you enjoy the convenience of not having to deal with any outlets or tangled me of wires.Easy to Install & Use:This wirele doorbell camera takes le than 5 minutes to set up without having to use any complicated tools.The doorbell can be controlled by APP, automatical work model, intelligent and portable.Product parameters:Product Name: Visual Intelligent doorbellMaterial: abs, pcba, polymer battery, speaker, camera, hardwareBattery capacity: 800mahPower input: 5v = 2aUsage time: more than 6 months of normal useCharging time: 1.5 hoursLead time: more than 1 yearsRecord preservation: free three days permanent bearing storage, unlimited times for 3 daysType of intercom: visual colorCamera resolution: 480x640Doorbell machine size: 8x5.3x2.2cm/3.15x2.08x0.86 inchDingdong machine size:5.5x4.2x2.5cm/ 2.16x1.65x0.98 inch (including usb: 1.2cm/0.47 inch height)Bell machine weight: 65.7g /0.14 LBDingdong machine net weight: 23.3g /0.05 LB 1 x Doorbell Machine1 x Internal ding-dong Machine1 x Charging cable1 x Adhesive installation aid1 x Manual .