This ESU - 50334 speaker is a 20mm by 40mm square one with a 4 - ohm sound chamber. It offers great sound quality and is identified by Part # 397 - 50334, suitable for all scales.

Using this speaker is easy. Just connect it to your device according to the standard audio connection method. When using, keep it away from water and high - temperature environments. For maintenance, you can gently wipe the speaker surface with a dry cloth regularly to keep it clean. Don't use sharp objects to touch the speaker diaphragm to avoid damage.