SONY Noise Canceling Earphones Functionality Confirmed Power: 1 AAA battery Manufacturer: SONY Model: MDR-NC11A High-quality noise-canceling earphones. 【What is the Noise Canceling Function?】 A function that effectively blocks out external sounds. Allows you to enjoy music and audio in a quiet environment. Unlike regular earphones, you can enjoy superior music and audio. Operation is simple with an ON/OFF switch. Provides a comfortable fit even for extended use. ・Brand: SONY ・Model Name: MDR-NC11A ・Function: Noise Canceling ・Connection Type: Wired ・Color: Metallic Blue/Metallic Green ・Power: ON/OFF Switch Original box and other accessories are not included. Condition of the Item Due to age and use, there are slight scratches and dirt. The item is in clean condition without any damage. Original box and other accessories are not included. The images are everything. Please check the images carefully before considering purchase.