Bluetooth V2.1+EDR. Hands-free earphone microphone with approximately 4 hours of talk time. - Model Name: BL-11BK - Type: Bluetooth headset - Function: Hands-free earphone microphone - Bluetooth Version: V2.1+EDR - Continuous Talk Time: Approximately 4 hours - Continuous Standby Time: Approximately 100 hours - Charging Time: Approximately 2 hours The package is slightly dirty, but the item is unused. Please consider this item with the understanding that it has been stored at home. The shipping method may be changed to Rakuraku Mercari Delivery.