... time through long-distance Specification:1. Wireless frequency: two option: 433MHz or 315MHz2. An adaptor: option: Input electricity from 110 ACV ... ~240 AC, customized. Adaptor choosing: two round pins, two flat pins, three pins customized3. Wireless receiving distance in open place ... remote controllers, one telephone line, one wired siren, one adaptor, one instruction Wireless & wired burglar alarm