Wireless transmitters and receivers can be used for electro acoustic instruments such as guitars, bass, violins, etc. Easy to use,plug and play. 6.35mm Jack We also offer 3.5mm adapter (included)for receiver to connect more Amplifier Equipments. 270 Rotatable Plug Design Available for instruments with input jack in different positions. Long Distance Transmission:The max transmission range is 164ft or 50m. The optimal transmission range is 65ft or 20m. Colour:Black Material:ABS Package Contents: 1X transmitter 1X receiver 1X charging cable 1X 6.35mm to 3.5mm adapter 1X portable storage bag 1X Instructions in Chinese and English 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.