Inovonics EN1210 EchoStream Single Input Universal Transmitter, Receiver. The Inovonics EN1210 single input universal is designed for use with almost any standard contact or sensor. Continuous check-ins ensure reliability. The Inovonics single input universal is designed for use with any standard normally open or normally closed contact. It is fully supervised and includes case tamper and battery. Mounting bracket included for quick and easy installation. Can be used with almost any standard NO/NC contact. Dimensions: 3.5″ x 1.7″ x 0.9 (8.9 x 4.3 x 2.3 cm). External Contacts: Normally open or normally closed. Cabling Requirements: 14-22 gauge wire, unshielded. 10′ (3 m) maximum distance to transmitter. EchoStream® frequency: 902-928 MHz, frequency hopping spread spectrum. Check-in time frequency: 3 minutes. Name: Inovonics EN1210 EchoStream Single Input Universal Transmitter, Receiver, Inovonics Wireless Corporation, Inovonics Wireless. Category: Inovonics Wireless, Intrusion, Intrusion, Alarm Contacts, Wireless Intrusion, Magnetic Contact Transmitters. Country of Origin: United States. Country of origin is subject to change.