2.4GHz Wireless Camera System Features: 7 Inch Wireless color LCD rear view monitor with digital sreen Built-in 2.4GHz wireless receiver. Frequency range:2400 2483MHZ,Group supported: 2414,2432,2468,2450 Distance:238m ( barrier-free) Reception capability:-87dB. TFT LCD monitor with wide view angle and high resolution display. Picture image may be adjusted for Horizontal, Vertical, Mirror and Normal viewing. Multi-languages of display available: English, French, Portuguese,Spanish, Russian, Dutch, German, Italian. Automatic back-lights for buttons. Full-function remote controller. Multiple video formats available: AUTO /PAL/ NTSC. 1DVD input and 4 channel receiver, 1 channel for video output and 1 channel for audio output. Operates from 10 32V. Support 12V or 24V automobile battery. Automatically switches to back-up, left or right side camera views. Speaker available and users can control the sound level from control panel. On-board speaker. 7" COLOR TFT LCD Monitor WM-127D Product: 7 Inch Wireless Color LCD Monitor with Digital Screen Reception capability:-87dB Demodulation Mode: FM Receiving Frequency Range: 2400 2483MHZ Range: 238m Frequency Group Supported: 2414,2432, 2468,2450 Audio output: 1W. Loudspeaker: one 15x24mm round loudspeaker. Power supply: Automobile storage battery (10-32V). Power consumption: about 6W . Outer dimension: 182mm (W) × 122mm (H) × 26mm (T) (without flush mount), 198mm (W) × 138mm (H) × 31mm (T) (with flush mount) Dot pitch: 0.192 (H) × 0.1805 (V). Resolution: 800×3 (RGB) × 480. Contrast: 500:1. Brightness: 400cd/m². Viewing angle: U: 50°, D: 60°, R: 70°, L: 70° Operating temperature: -20 ºC +55ºC,RH90%. Storage temperature: -30 ºC +80ºC,RH90%.