Features & Benefits Contains: Over-door light and sounder, one toilet reset switch, one main control module, ceiling pull unit with pull cord and disabled WC sticker Simply pull cord to activate sound alarm & over-door light outside room System can be extended with 2 additional pull cords or one additional pull cord and sounder Pull cord length 275cm Monitored 24hr backup battery ensures system works in the event of power failure Test facility of alarm sounders and lights provides safety for users Parts also sold separately as accessories