Transmitter Only - This is only the remote transmitter with On/Off function and will come with either the 1001-A or 1001-B label. Compatible With - This remote transmitter works with the 1001 Series of Skytech Remote Systems. Transmitter does not function alone, must be used in conjunction with an existing Skytech Receiver. Quick Install - This transmitter pairs with your exsisting Skytech Receiver through it's built in "Learn" function. Battery Operated: Radio Frequency RF operated transmitter., does not need line of sight to work with your SKYTECH VERIFY - Please verify your model number with your manual before purchasing and installing to ensure compatibility. USA BASED - Allparts Equipment & Accessories takes pride in distributing our products in Southwest Michigan, USA. We are committed to delivering superior products that ensure performance, reliability, and durability. Additionally, Allparts offers 50+ combined years of top-tier USA based technical support to assist you with any questions or issues, ensuring you receive the best possible experience with our products. **This is the SKYTECH On/Off Transmitter Only** The 1001-A / 1001-B Replacement remote transmitter for Skytech 1001 series remote controls works with the SKY-1001-A Remote System Only, for use with 1001-A and 1001TH-A receivers. This 1001-A remote Transmitter operates best on (4) AA Energizer batteries. "Not Included" Service Note: The 1001-A Remote Transmitter box is designed for "Millivolt" operated Skytech remote systems. **This is the Transmitter Only**