Sennheiser Dual-sided bluetooth headset, dongle, charging stand w/ USB cable

Specification :

• Wearing style - Fully adjustable headband, over-the-head wearing style
• Technology - Bluetooth® Version 4.0 / supported profiles: HSP 1.2 + HFP 1.6 + A2DP 1.2
• Talk time - Up to 15 h
• Charging time - 2 h 30 min
• 50% charging time - 40 min
• Range - Up to 25 m (device dependent)
• Weight of headset - 2.89 oz
• Microphone type - Ultra noise-cancelling
• Frequency response - 150 Hz – 6,800 Hz
• Speaker type - Dynamic, neodymium magnet
• Frequency response - 150 – 15,000 Hz
• Sound pressure - Max. 118dB (SPL) limited by ActiveGard®
• What's in the box?
• Headset
• Dongle
• USB charging stand
• Safety guide
• InCompliance leaflet
• Quick guide