SKU 615404 Manufacturer Number T520BTBLK model compatibility for Devices with Bluetooth product type On-Ear Headphones audio control On-device Audio Control connector type USB (Charging) battery type AC Rechargeable Built-in Battery design Soft Ear Cushions, Padded Headband, Foldable special features Voice Assistant, up to 57 Hours Battery, Hands-free Calls gender Unisex weight .35 kg ( .77 lb ) multipoint - number of connected devices Simple Multi-point - up to 2 Devices microphone type Built-in Microphone connectivity technology Bluetooth color Black character/model series Standards Items Shipping Weight 0.53