Product Information:About The Aiphone RYPA 12V DC Door Release RelayThe Aiphone RYPA 12V DC Door Release Relay is designed for use with Aiphone models LDFC/CA, LDCS, LEF Audio, LEBn, VCM, and LEF Video. The Aiphone RYPA is a 12 Volt DC door release relay with a normally open output.Additional Information :Features:bull; Door release activation, momentary or talk line controlledbull; Controlled by N/O contactSpecifications:bull; Power Source: 12V DCbull; Relay Contact Rating: 24V DC, 1Abull; Dimensions: 7/8" L x 2 1/8" W x 1 3/8" D