Specifications:Build-in bluetooth-compatible chip provides faster and more stable transmission.Automatic power on and pairing, simple and convenient for music listening.Double noise canceling, supports binaural high clarity call, clear listening without barrier.Lightweight and compact, brings true wireless music enjoyment.Item Name: bluetooth-compatible EarphoneBluetooth Version: V 5.0Bluetooth Range: about 10m Outdoor Linear DistanceBattery Type: Polymer Lithium Battery 55mAh (Included)Ear Bud Battery Capacity: 55mAh (Included)Charge Box Battery Capacity: 350mAh (Included)Music Listening Time: about 4HPhone Call Time: about 3.5HStandby Time: about 120HCharge Time: about 1-2HCharge Voltage: DC 5VSupports: HFP/HSP/A2DP/AVRCPFeatures: Lightweight, Binaural Call, bluetooth-compatible Connection, Stereo Sound, In-ear, Ear BudCharge Box Size: 48mm x 48mm x 30mm/1.89" x 1.89" x 1.18" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x bluetooth-compatible Earphone1 x USB Charger2 x Ear Plugs1 x User Manualor1 x bluetooth-compatible Earphone1 x Charge Cable1 x Charge Box2 x Ear Plugs1 x User ManualorA Pair of bluetooth-compatible Earphones1 x Charge Cable1 x Charge Box2 x Ear Plugs1 x User Manual