The product is headphones from Edifier with the following technical specifications:

• Headphone Type: over-ear
• Connection Type: wired / wireless
• Compatibility: PC / laptop
• Bluetooth: Yes
• Battery Life: up to 72 hours
• Microphone Noise Cancellation: yes
• Volume Control: Yes
• Design: open-back
• Driver Diameter: 30 mm
• Connection: Bluetooth / USB
• Color: black-silver
• Detachable Cable: Yes
• Detachable Microphone: No
• Included Accessories: user manual, USB cable, USB receiver
• Rechargeable: yes
• Nominal Capacity: 400 mAh
• Replaceable by User: no
• Consumable: yes
• Recyclable: yes

Note: Free collection of old portable batteries and LMT batteries is available.