... max. 4.Trigger volume:70dB KA-SLH06 light control and sound control lamp holder specifications:1) Power source ... installation needed,directly ready for operation;2) Light control function:With light sensor,only work when the ambient brightness ... , hall, office, basement, warehouses and houses etc.Energy efficient, economical, convenient, practical. light control and sound control lamp holder (KA-SLH06) ...