iKross A2DP Wireless Bluetooth 4.0 Headphone with Charging Dock/Microphone iKross Bluetooth 4.0 feature: 8 times the bandwidth over the 2.1 standard producing crystal-clear sound quality. A2DP Bluetooth profile allows for ultra-high definition media playback. One-motion call answering Feature; multipoint connection; microphone's CVC background noise canceling technology for improved connection clarity. Battery life: Rechargeable, built-in Lithium-ion battery provides 5 hours of continuous play time, while the magnetic charging dock automatically triggers Sleep/Wake modes, conserving battery life for even longer use. Use charging dock (connected to a power source) or the included USB cable to charge the headset. Package contents: IKROSS Bluetooth 4.0 Headset, charging dock, USB cable, adhesive mounting strip, vehicle air vent mounting clip, 1 ear hook, 2 eartip pairs, user manual.