The earphone is marked by bone conduction technique, so it can reduce the pressure on your ears and make you wear comfortably.This earphone can achieve long play time about 13 hours because of its high-performance large capacity battery.Using high-quality ABS material, this product is lightweight and durable to use.The length of the product is 14cm, the width is 9cm, and the height is 4cm.It is suitable for all Bluetooth-compatible devices such as mobile phones, tablets and so on.Item Name: Wireless EarphoneMaterial: ABSBattery: Built-in 170mAh Rechargeable Battery (Included)Bluetooth-compatible Version: 5.2Music Time: 13HCall Time: 15HConnection Distance: 10 MetersSupported Protocols: HSP/HFP/A2DP/AVRCPHorn Material: Double Composite Membrane HornFeatures: Bone Conduction, Low Latency, Clear SoundSize Details: 14cm x 9cm x 4cm/5.51" x 3.54" x 1.57" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Wireless Earphone1 x USB Cable1 x User Manual