1、5‑inch high definition LCD screen, 420TVL shows 480X234 resolution. 2、Built‑in lithium battery, charging can be used, reduce the trouble of changing the battery. Digital RF modulation with frequency hopping (automatically switched RF channels). 3、Dynamically select clear channels to avoid interference from other 4ghz devices.Data protection (support for user ID identification). 4、Hypnotic music playback function; Temperature display function; Two‑way intercom, support data encryption. 5、Night vision function (effective range: 5 m). Both the receiver and camera have built‑in microphones and speakers Open space transmission range up to 300M(990ft). 2 x Plug 1 x Camera 1 x Receiver 1 x Manual  Condition: 100% Brand NewItem Type: Baby MonitorModel: ZN-YE-JK-850M Receiver Battery Type: Lithium batteryReceiver Battery Capacity: 950mAh