Specification Item Type: Door Bell Material: ABS Plastic Color: As Pictures Shown Outdoor-Bell: Voltage Range: 4 x AAA batteries (not included) Working Temperature: -20-55 Transmission Distance: Approx. 200m / 656.2ft in the open, 5 - 50m / 16.4 - 164ft in obstacles Working Frequency: 467.6375MHZ Working Time: 4 Months Waterproof Level: No Waterproof Function Indoor-Bell: Voltage Range: 5V 1A Working Temperature: -20-55 Transmission Distance: Approx. 200m / 656.2ft in the open, 5 - 50m / 16.4 - 164ft in obstacles Working Frequency: 467.6375MHZ Waterproof Level: No Waterproof Function Features The frequency of use of this product is in accordance with national regulations and will not cause harmful electromagnetic interference, which is universal worldwide.
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