This is a high quality made in USA bell which produce a long continuous ringing sound. The striker continues to strike the gong in rapid-fire as long as current is applied. Specified for timing, scheduling, paging and general alarm applications. With the weatherproof back box, you can use it as an outdoor bell. This kit is specially packed as an external bell kit for the Netbell-KL-M2 and Netbell-KL all-in-one system, no controller for scheduling and operating for this bell kit alone. You can also add a weatherproof back box that can seal the bell so that it can be used as an outdoor bell (weatherproof back box is not included, purchased separately.) 

Kit includes:
1. One 6 inch Edwards Signaling 340-6G5 Bell, 24VAC, produces102dBa@1m and 92dBa @10', 90dBa@30’ from our in-house testing, color: grey
2. One 3-meter bell cable with CP connector that provides quick connect /disconnect this bell kit to the Netbell-KL server.
3. One 24VAC power transformer to power the bell.
To add the external bells to the Netbell-KL is incredibly easy, just connect the external bell kit with the provided cable, plug the bell cable to the Netbell-KL external bell CP connector, you are all set. The external bell can be connected at 250 feet away with 18AWG cable (500 feet with 16AWG cable) to the Netbell-KL server.