Dedicated two-way intercom telephone RL-209 AC- wired doorbell cards
RL-209 wired two-way radio : AC- power supply / two-way call / two-way intercom
Intercom \\u0026 intercom doorbell
Dedicated call two-way intercom call call clarity cost –free telephone network the effective distance of about 3000M this dual model intercom doorbell for office warehouse janitor and other internal dedicated intercom stand-alone buildings adapted to guests intercom calls . stylish looks elegant inexpensive and very practical. power supply can also be plugged in safe and convenient
