MISTRAL - maximum reliability and uncompromising quality.500 meters range (free field)The interference-free radio connection up to 500 meters guarantees a reliable door gong.12 polyphonic melodiesWith the large selection of attractive ring tones, you can personalize your Mistral 650 completely flexibly.Convenient mute functionTHE MISTRAL 350 can be muted for 1, 3, 9 hours or unlimited, for an undisturbed night's sleep.Multiple call differentiation for multiple doorsWith the help of the distinctive ring, you can immediately recognize whether it rang at the front door or at the garden gate. Up to 12 wireless doorbell buttons can be programd and assigned an individual ring tone.Optical LED signalIn addition to the ring tone, activate the bright LED flash as optical signaling.Low battery indicatorThe radio gong emits an optical and acoustic signal when the batteries in the doorbell button and the gong are almost empty. So you don't miss a visit, because the battery is surprisingly empty.Th