13.5inch high definition LCD screen, 420TVL shows 480X234 resolution. 2Builtin lithium battery, charging can be used, reduce the trouble of changing the battery. Digital RF modulation with frequency hopping (automatically switched RF channels). 3Dynamically select clear channels to avoid interference from other 2.4ghz devices.Data protection (support for user ID identification). 4Hypnotic music playback function; Temperature display function; Twoway intercom, support data encryption. 5Night vision function (effective range: 5 m). Both the receiver and camera have builtin microphones and speakers Open space transmission range up to 300M(990ft). Condition: 100% Brand NewItem Type: Baby MonitorModel: ZN-YE-JK-850M Receiver Battery Type: Lithium batteryReceiver Battery Capacity: 950mAh 2 x Plug1 x Camera1 x Receiver1 x Manual