Unno Tekno Ovala Wireless Headphones

Bluetooth® version: 5.0.
Passive noise reduction.
Functions: Track control, hands-free calling & volume control.
Foldable & adjustable headband.
Micro SD card slot.
Battery: Lithium-Ion 400 mAh.
Charging/Playing time (hrs): 3/15.
Driver diameter (mm): 40.
Maximum power output (mW): 150.
Frequency range (Hz): 20 - 20K.
Impedance (Ohm): 32.
Sensitivity (dB): 108 +/- 3.
Micro USB charging cable & 3.5 mm audio cable included.
Weight (oz): 6.5.