Description If you are looking for a bone conduction headphones with reliable quality and reasonable price, I will tell you that our earphones will be your best choice. We adopt high-end quality, so you can keep it for a long time. Meanwhile, it owns a cool simple attractive appearance design. It would be your best partner in your life. Features -Color: Black-Material: TPE- Size: 13.00X11.00X2.00cm/5.11X4.32X0.79in - Ergonomic design, comfortable and stable for you to wear.- You can still wear while wearing eyeglasses. And cool design matches with the many kinds of your clothes styles.- Noise reduction, eliminate interfere, clear sound quality.- Can listen to music and notice the surrounding environment at the same time.- Made of premium material for durable use. Working several years for you.Parameters:specification: 5.1Weight: 20gBT distance: 10-15mSpeaker type: Bone conduction technology speakerFrequency: 20 hz - 20 KHZMicrophone sensitivity: -42dBBT version: V5.1Battery: 120mAh lithium polymer batteryPlaying time: 4-5 hoursTalk time: 5-6 hoursCharging time: 1.5 hoursStandby time: 5 daysPacking list: 1 x Pair of wireless earplugs1 x charging cable1 x User manual