Alarm Volume: 25-80dB (4 volumes for option). Transmission Distance: more than 100m (in open air). Производитель: ERAY. Применение: Дверь. Wireless Frequency: 315MHz. Размер модели: WDB-5F. Suitable Places: House Door
Размер модели: RTU5025. No call charges: Yes. No distance limit: Yes. work frequency: 900/1800MHz, or 850/1900MHz. No need to a remote control: Yes. Authorized phone numbers: Up to 999 users. Применение: Лично.