easy to connect and set up the doorbell and LiveHome App,2pcs batteries, long standby time,The doorbell is powered by 2pcs 18650 batteries, 2*2600mAh. (Battery not include in this link ) Charging time: 10 hours. You can also use a 1A USB charger (via doorbell Micro- -port). Please keep the 18650 battery fully charged before use.The battery lasts two to four three under normal use (five minutes a day). It also depends on the frequency the doorbell is used in.Night vision, protect your home day and night with infrared night vision.Weather reistant ,suitable for ourdoor conditions. Two-way audio ,with built-in camera and speakers ,with noise cancelltion.Lets your communicate with vistons from anywhere Installed with a 166-degree wide angle len, provide a clear and wide field of view outside the door. Connection Method:Wireless Camera Sensor type:CMOS Answering Mode:Hands-free Viewing Angle (degree):160 Type:Entrance Machine Display Screen Type:Color Zone Input:None Connection Type:Wireless Installation:Wall Mounting Technology:Digital Smart Home Interface:No Waterproof:Yes Access Control:None IP Camera Interface:No Model Number:V6 Sensor Size(Inch):1/4 Power:18650 Li Battery / 2600mAH Material:plastic Doorbell:Yes Resolution:720P CPU:GM8135S, Built-in ARM926 @Max. 440MHz High Speed Video Coprocessor Video format:H.264 Battery discharge time:2 months (2pcs batteries) Memory:Support cloud storage (the hardware doesn't s) Cloud storage ,with no subscription fees,your video are stored in the free cloud for up to 90 days Simple operation colour:black Material:plastic size:13*8*3cm Sensor Size(Inch):1/4 Package Contents: 1 * V6 720P Smart Doorbell Only the above package content, other products are not included. Note: Light shooting 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.