The intelligent and upgraded chip allows for anti-interference and more stable signal transmission.The built-in sensitive MIC features noise reduction, which can provide you with stereo and high-fidelity sound effect.Made of ABS material and electronic components, the Bluetooth earphones are durable and environmental-friendly to use. It is of convenience that the item has screen touch function.The length of the Bluetooth earphone box is 83mm, width is 45mm and height is 32mm.The Bluetooth earphone is suitable for outdoor, for sports, for office, for travel, etc.Item Name: Bluetooth EarphonesMaterial: ABS,Electronic ComponentModel: K55Bluetooth Version: 5.0Transmission Distance: 10mSupport Protocol: HFP, HSP, A2DP, AVRCPResponse Frequency: 20Hz-20KHzCharging Box Battery Capacity: 400mAhHeadphone Battery Capacity: 40mAh(Included)Charging Voltage: DC 5VMIC Diameter: 12mmFeatures: Anti-interference, Lightweight, Cool LightSize Details: Bluetooth Earphone Box: 8.3cm x 4.5cm x 3.2cm/3.27” x 1.77” x 1.26” (Approx.)Notes:Due to the light and the screen setting difference, the item's color may slightly differs from the pictures.Please allow slight dimension difference due to the manual measurement.Package Includes:2 x Bluetooth Earphones1 x Earphone Box1 x Charging Cable