This is a wind-up pendulum-type metronome. It's working without any problems. It sounds good. There's a possibility it's slowing down (or will slow down). It seems necessary to compare it with an electronic metronome regularly. There are scratches and stains. There's rust. This is a product from about 40 years ago, so please be aware that it may break down in a short period of time. Width: Approximately 10cm, Depth: Approximately 12cm, Height: Approximately 20.5cm - Brand: NIKKO SEIKI - Type: Metronome, Analog, Pendulum type - Color: Ivory - Size: Approximately 20cm - Setting Range: 40-208 BPM