Stable performance, strong signal reception, linear distance of more than 10 meters Input voltage: 5V Output power: 4 ohms 3W Bluetooth and power amplifier functions are two-in-one. It can be used after connecting to the power supply and speakers. It can be used in a small space and improve the production yield rate It has a wide range of applications, including Bluetooth speakers, toys, massage chairs, household appliances, electric vehicles, lighting, photovoltaic products, fitness equipment, Alipay and other QR code payment voice broadcasts, etc Name:Bluetooth Module Material:PCB Model:CA-6928 Transmit power: 4dBm colour: Navy blue Package Contents: 30 x Bluetooth Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.