Black wireless earbuds equipped with SOLID BASS technology. - Brand: audio-technica - Model Name: ATH-CKS50TW2 - Type: Wireless Earbuds - Features: SOLID BASS - Color: Black Thank you for viewing. These are the audio-technica wireless earbuds "ATH-CKS50TW2". They are a model from the "SOLID BASS" series, which specializes in deep bass. They offer up to 25 hours of continuous playback with the earbuds alone when noise canceling is off, and up to 65 hours with the case. They feature a "magnetic switch" function that turns the power on when the earbuds are separated and off when they are attached magnetically. They have IP55 equivalent water and dust resistance. They are equipped with hybrid noise-canceling and external sound intake (hear-through) functions.