... LCD rear view monitor with digital sreen Built-in 2.4GHz wireless receiver. Frequency range:2400~2483MHZ,Group supported: ... , French, Portuguese,Spanish, Russian, Dutch, German, Italian. Automatic back-lights for buttons. Full-function remote controller. Multiple video formats ... Support 12V or 24V automobile battery.Automatically switches to back-up, left or right side camera views.Speaker available ...