Specifications:The 270 degrees rotatable boom arm allows to adjust the angle and fit this headset in either right or left ear.Soft rubber material, comfortable and lightweight, Even if the long time wearing a headset will not have any burden, no heavy feeling.This BT5.0 headset with built-in dual HD Mic, RCV4.0 noise cancellation earbuds, lets you get and clear voice even in a noisy envonment.Low power consumption long standby time, built-in 170mAh lithium-ion battery provides up to 150 hours for stand-by and up to an amazing 7 hours for music or continuous talkSuitable for work, driving, sports, and meeting. A wonderful for someone who likes playing games.Specification:Item: Business HeadsetModel: F910BT:V5.0Material: ABSColor: Black,Blue(Optional)Play time:7 hoursTalk time:7 hoursStandby time:150 hoursBattery: 170mAhFrequency Response Range: 20Hz - 20KHzFunction:Play/Pause//Answer call/Reject CallPackage Size: 14*9*5cm/5.51*3.54*1.97inPackage Weight: 20g/0.71ozPackage List:1 * Business Headset