The RS-191 Handset is designed exclusively for use indoors in combination with the RS-190 Substation. Lifting the handset permits handset conversation. Handset conversation can be established in conjunction with the optional Flush-mount Hands-free Master Station N-8031MS. ; Designed for use indoors in combination with RS-190 Substation Lift the handset for a conversation Handset conversation can be established in conjunction with optional Flush-mount Hands-free Master Station N-8031MS ;

• Designed exclusively for use indoors in combination with the RS-190 Substation