It worked with batteries inserted. The button operations are also problem-free. The sound came out clearly. It goes "Beep beep pipipi beep" and it's quite loud. No box or instructions, only the main unit. There are air bubbles? on the LCD screen. It did not affect the operation. Batteries: LR44 x 2 New batteries have been inserted to confirm operation. Everything pictured in the images is included. Please check the condition along with the images. This is a used item, so please refrain from bidding if you are concerned about minor scratches. No claims and no returns accepted. If you understand everything and can perform maintenance yourself, please bid. Please judge the exterior condition from the images. The items in the images are all that are included. I don't have much knowledge, so I would appreciate it if you could judge and consider the item based on the images. This is a personal item stored and sold by an individual, so I will not accept claims or returns after arrival. However, if anyone is looking for this item, please consider it.