... LCD rear view monitor with digital sreenBuilt-in 2.4GHz wireless receiver. Frequency range: 2400~2483MHZ,Group supported: 2414,2432 ... LCD Monitor with Digital Screen - WM-115DProduct: 5.6 Inch Wireless Color LCD Monitor with Digital ScreenReception capability: -87dBDemodulation Mode: ... .Contrast: 500:1.Brightness: 200cd/m².Viewing angle: U: 50°, D: 70°, R: 70°, L: 70°Operating temperature: -20 ºC ...