Instant purchase OK! This is a Sony cassette deck remote control, model RM-J903. It was an accessory for the cassette deck TC-WR790. Although I haven't confirmed it with the deck itself, I have confirmed with my smartphone that all buttons emit infrared light. (See photo 6) Batteries are not included, so please prepare them yourself. [Specifications] ・Dimensions: Approximately H 17.5cm x W 4cm x D 1.8cm ・Weight: Approximately 56g (excluding batteries) This item has been stored for a long time, so please judge the details from the photos. If you are looking for a perfect item, please refrain from purchasing.