Herutu Electronics Corporation provides industrial wireless tools solutions for manufacturing sites: Pokayoke Tools (transmitter & receiver, pliers wrench, check pen), Wireless Call Systems (Andon), and Remote Control Systems.

Herutu Electronics provides products based on high quality wireless technology in which we have built expertise over many years to respond to customers' desire to reliably transmit information to distant objects. In addition, we are consistently committed to product development, manufacturing, sales, and support while maintaining the highest quality, responding promptly to customers' orders, and delivering them quickly

http://www.herutu.co.jp/en/