We strive for prompt service. Please refrain from negotiating prices in the comment section. Use the price negotiation button in the bottom right of the image. To prevent trouble, we do not offer reserved listings! All items are first-come, first-served!! If you are dissatisfied with the product you receive, or if it does not work, we will accept returns and refunds! Please contact us via the transaction message before leaving a review. Initial setup may be required, in which case please contact the manufacturer. We generally ship via Yu-Packet Post. Please contact us if you have other shipping preferences. We have confirmed that all buttons emit infrared light. Button response is good ◎ For radio wave type items, only power-on or operation has not been confirmed. Please understand. We have cleaned the items, but if you are concerned, please purchase with the understanding that you may need to clean them yourself. Batteries are not included. For usage instructions and compatible model numbers, please contact the manufacturer. Please be sure to check the condition in the photos and understand before purchasing. If you have any questions, please ask in the comment section.