I am an Chinese seller,providing customers with high-quality and low-cost products. The types of products we sell include Home & Kitchen,Health & Beauty,Fashion Clothing,Electronics,Watches & Jewelry,and so on. We keep up with the most popular fashion trends. If you like our products, please follow us and become our followers and fans. Sincerely at your service .Please feel free to contact us if you have any questions.Specifications:Upgraded Bluetooth V4.2, the Bluetooth signal has a stable transmission distance of 10 meters.Ultra-lightweight and high-definition sound quality blend bass to give you an extraordinary experience.IPX4 waterproof technology prevents sweat, rain, and water. Ear-hook and neckband style, not easy to fall off, more comfortable to wear.Suitable for running, hiking, yoga, fitness, travel and more.Item Name: EarphonesMaterial: TPE + Silicone + ABS Model: A847BL Type: In-ear Charging Time: 1.5 Hours Compatibility: for iPhone/iPod, Mobile Interface Connection: USB to Micro USB Connectivity: Wireless Frequency Response: 20-20000Hz Impedance: 16ohms ± 15% Music Time: 6 Hours Sensitivity: 90dB ± 3dB Call Time: 8 Hours Bluetooth: Yes Bluetooth Chip: CSR8635 Bluetooth Distance: 10m with Obstacles Bluetooth Protocol: A2DP, AVRCP, HFP, HSP Bluetooth Version: V4.2 Battery Capacity: 100mAh Lithium-ion Battery Battery Type: Built-in Waterproof Level: IPX4 Functions: Answer Phone, Bluetooth, Microphone, Multi-connect Function, Eliminate Noise, Switch Songs, Sweat-proof, Waterproof VoiceFeatures: Wireless, Easy to Use, Neck Hanging StyleCable Length: 0.6m/23.62" (Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 Pair of Earphones3 Pair of Ear Caps1 x USB Cable1 x English User Manual a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a