Hello! Welcome to our store! Quality is the first with best service. customers all are our friends. Fashion design,100% Brand New,high quality! Material: nylon Color: Black Bluetooth distance: 5-10 meters Power supply: DC5V USB Bluetooth Version: 3.0 Work Frequency: 2.4GHz Features: Make your audio entertainment(without Bluetooth) connect with any Bluetooth smartphone; Better sound without wires : After connected with smartphone, tablet... you can listen the music, video,games through your good speakers /sound system; DC5V power supply, connecting AUX / RCA audio Line to work, it will not work if you are Inserting Speakers with alone USB; Need to use your own audio cable and USB power supply There is 2-3% difference according to manual measurement. please check the measurement chart carefully before you buy the item. 1 inch = 2.54 cm Please note that slight color difference should be acceptable due to the light and screen. Package included: 1 x Bluetooth Audio Receiver 1 x 3.5mm Audio Line cable