★Complete dual-way intercom system for easy operation.
★Built-in American Microsoft language processing chip promises clear voice.
★Indoor volume and outdoor volume can be adjusted separately.
★Suitable for places with inside and outside intercom-munication such as bank,
★hospital, ticket office and stock company, etc.
★Input voltage: AC (AC) 100V ~ 240V
★Output voltage: DC9V
★Main sound box: 2W 100Hz ~ 15KHz
★Sub-sound box: 2W 100Hz ~ 15KHz
★Inside microphone: -48db   20Hz ~ 20KHz

★Outside microphone: -48db   20Hz ~ 20KHz
★length x width x height: internal host 15.8 cm x 8.7 cm x 4.6 cm,

external speakers  9.3 cm x 7.0 cm x 2.5 cm. mic length: 37 cm.