Heat detection and Voice detection 2.5" LCD screen with 480 ?234 resolution OSD menu supported for easy operation and more function available Small palm size of receiver for mobile usage Built-in 8 IR lights for 5m night vision range 4 channels available to Channel scan and channel skip for multi-camera usage Big 2.5" TFT Screen Designing The big 2.5 inch TFT screen with 480?34 resolution Channel Skip " Channel Scan " For Day & Night surveillance, the camera is built in 7 infra-red lights which provide min. 5m night vision range. builds in 1/3" CMOS image sensor and microphone, provides 300K pixels high quality display and high sensitive audio monitoring. The product works on the license-exempt 2.4GHz industrial,scientific, and medical(ISM) frequency band.