This is a "professional" bugging device with paired receiver. At this point it was already some years old - I'd guess 1990s but I can't be sure.I believe it was originally bought privately from one of the London surveillance shops. The kit comprises: Custom wooden carry case, Room transmitter with microphone and removable antenna, Ruby KZ-100 receiver with detachable antenna and earpiece, spare antenna, batteries. The receiver is in good condition. This takes a 28L camera type battery (6v). I will include a working battery and a spare (although please note these are both out of date).
This must be dual frequency because it has an A/B selector switch on it (it should be on B). The transmitter has, at some point, had a battery leak so there's various chemical marks on/in it. Also the black powder coating has started to deteriorate, particularly on the inner side of the detachable lid. The lid is quite stiff to slide off/on.
The transmitter takes 2 x N (LR1) batteries (1.5v). Again I will include two working batteries and two spares and these are also out of date. I'm not 100% sure what frequency it operates on, it's probably somewhere around 360-400mhz. It is in working condition BUT please note that the transmitter can be a bit temperamental which I believe is down to how you place the two batteries inside it. It may be as simple as the contacts/spring needing cleaning after the battery leak, or it may be something more serious.
Obviously technology has moved on nowadays so you wouldn't really want to be using this operationally so to speak, but it's of definite visual interest and a good talking point! The item "Vintage Professional' Spy Bug transmitter & receiver listening device Ruby Japan" is in sale since Monday, February 11, 2019. This item is in the category "Home, Furniture & DIY\Smart Home & Surveillance\Home Surveillance\Home Surveillance Parts & Accessories\Other Surveillance Parts & Accessories". The seller is "flat07" and is located in Ilkley. This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, United arab emirates, Ukraine, Chile.