Feature *Stable performance, strong acceptance signal, straight line distance of more than 10 meters. *The input voltage is 3.3-6V DC power. *The output is a single -channel audio. *The audio board is small, simple in wiring, and stable performance. *Application fields include Bluetooth-compatible audio, massage chair, home appliances, electric vehicles, toys, toys, lighting, photovoltaic products, fitness equipment, supporting Alipay and other QR code receiving voice broadcast functions. Specification Input voltage: 3.3-6V DC power supply Output: a single sound road audio Color: green, blue optional Size: 23 × 15mm Package included 1*Audio module Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. CA-6928 DC 3.3V-6V small Bluetooth-compatible audio module Green blue board Materials: Made of high quality materials, robust and durable, safe and convenient to use. Size: matched to the corresponding model to match your working tool needs, check if it is the size you need before you buy. Function: This is a good companion you need on your tools, giving you a more convenient working life, in case you are busy indoors and outdoors Satisfaction guarantee: Your purchase is fully protected when you order today. If you are not satisfied with with our products, contact us any time, We will get you back within 24 hours try our best to make things right.