* Function included: door bell, door phone, remote unlock

* Product features: handset

* Case: plastic

* Bell ring: dingdong or other options

* Door stationcase: plastic

* Systempower: 12 V, 12W

* Lock connection: Yes

* Cable: three-core, 10-15 meter

* Package: each set in one color box; 20 set in one carton

* Product approval: CE