Hign-concerned Chemical : None Material : Plastic Category : Earphones & Headphones Active Noise-Cancellation : Yes Volume Control : Yes Control Button : Yes Vocalism Principle : Dynamic Wireless Type : bluetooth Communication : WireLess Style : Neckband Origin : Mainland China Brand Name : WYMECT BT313 Bluetooth-Compatible Earphones Magnetic Headphone Sport Wireless Hanging Neck Earphones with Mic for Xiaomi Red Mi Huawei Product Features Allow you to enjoy digital-quality music wirelessly and convert between music and phone calling mode freely. Support headset stereo devices to receive A2DP stereo music from laptop computer, tablet PC, Smartphone or an other device that supports headset stereo audio. Talk time: up to 4 hours Music time: up to 4.5 hours Standby time: up to 120 hours Specification of headset Bluetooth version: V4.1 +EDR Operation distance: 10m Range of frequency: 2.4 to 2.4835GHz ISM band Sensitivity: -85db Music format: MP3/WMA Rechargeable lithium battery: 80mAh Type: stereo headphone with MIC Speaker: 14.2mm Impedance: 32 ohm Frequency response: 20HZ-20KHZ Rated Power: 20mW Power capabitity: 115mW Microphone Unit: -58dB3dB package Include 1x BT313 Bluetooth Earphone 1x USB Charging Cable 1x User Manual window.adminAccountId=253923034;