Manufacturer: YAMAHA (Yamaha) ・Type: AV Receiver ・Model Number: RX-S601 ・Items: Main unit (RX-S601), remote control, YPAO microphone ・・・ No AA batteries (2), AM antenna, FM antenna, instruction manual, or quick setup guide. Regarding the remote control, the RX-S601 uses RAV547 ZQ56690, but this is RAV574 VDM86900 for the RX-V4A. 《Reference》 Regarding the remote control for YAMAHA (Yamaha) AV receivers (amplifiers), ●The model number for the RX-S601 is RAV547 ZQ56690, and the main differences are as follows: (1) The RX-V4A is a newer AV receiver, so the remote control has a newer design. However, because the signals emitted from the basic remote control are the same, you should be able to operate it in much the same way. (2) There is no PARTY switch, so you cannot switch to "Party Mode," which allows you to listen to the same music in all rooms using the remote control. However, I don't think you will use Party Mode very often, so I don't think it will be a problem. (See instruction manual P70) ・Features: Please see the website. https://jp.yamaha.com/products/audio_visual/av_receivers_amps/rx-s601/index.html ・Instruction Manual: Can be downloaded from the website. https://jp.yamaha.com/files/download/other_assets/7/641337/web_ZQ43160_RX-S601_om_J_Ja.pdf ・Quick Setup Guide: Can be downloaded from the website. https://jp.yamaha.com/files/download/other_assets/8/641328/web_ZQ42960_RX-S601_esg_J_Ja.pdf ・Other 1: When listing the item, I confirmed the sound output by connecting it to a TV with an HDMI cable. I also confirmed the Bluetooth connection with a smartphone. ・Other 2: Please check the photos for scratches, etc.