Tork Light Duty and General Purpose Bell APPLICATIONS: Designed to operate on either bell ringing transformers or batteries. Non-adjustable sound. FEATURES: DESCRIPTION: 4" Gong VAC: 8-16 VDC: 3-6 AMPS: 1 dB: 78 @ 10' ALARM: Bell ringing, non-adjustable sound. MOUNTING: Fully enclosed sturdy steel bases and covers. Base and cover snap together, no screws required. BRAND EQUIVALENT: Carlon DH924 Morris 78140