Headphones Koss BT540i

Weight: 231 g
Design: Full size
Description: Design: over-ear, device type: wireless headphones, design features: microphone, detachable cable
Additional Information: Battery type: Li-Ion; Range: 10 m; Battery type: own Li-Ion; Range: 10 m; Case included: yes; Answer/end conversation: yes; Repeat last number: yes; Job profile support
Talk Time: 8 h
Impedance: 38 ohm
Sensitivity: 100 dB
Design features: Microphone, detachable cable
Charging time: 2 h
Device type: Wireless headphones
Mount type: Headband
Maximum playback frequency: 25000 Hz
Minimum repeatable frequency: 10 Hz
Technology: Dynamic
Number of microphones: 2
Wireless connection type: Bluetooth
Sensitivity options: DB/mW