Bluetooth Transmitters features: Bluetooth 5.0 Wireless USB PC Dongle Adapter Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Specifications: Bluetooth Standard:Bluetooth V5.0. Model:USB Bluetooth V5.0 Adapter Dongle interfaces:USB Transmission rate:3Mbp/s Bluetooth version:Bluetooth V5.0 Working range:10m Working frequency:2.4MHz Material:ABS. Feature: 100%wonderful and High Quality This extremely portable, lightweight wireless audio transmitter & receiver is an ideal wireless audio solution for a wide range of situations and uses1. This extremely portable, lightweight wireless audio transmitter & receiver is an ideal wireless audio solution for a wide range of situations and uses. Package Include : 1pc x Bluetooth Adapter. Notice: Please allow 1-3mm error due to manual measurement. The real Colour 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. please understand