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Characteristic WITH EASY TO USE BUTTONS Allows Skip/Play/Pause on your music tracks as well as all phone use without reaching your phone. Up to 30ft Bluetooth range in the open space and 10ft in the obstacles space. GREAT SOUND QUALITY: Equipped with electroacoustic drive unit and ultra-small composite shock film which is used exclusively for professional sound equipment, especially perfect for bass! parameters: The noise reduction level is: AEC / NR Waterproof level is: 5 level Speaker size: 10mm X 2 Sensitivity is: 108dB Â± 3dB Bluetooth version: AB1522S, 4.2 + EDR Bluetooth support: phone hands-free Bluetooth support protocol: A2DP / AVRCP / HSP / HFP / SPP / HID Frequency response range: 20Hz-20KHz Transmission frequency: 2.4GHz-2.48GHz Maximum Bluetooth reception effective distance: 30ft Battery capacity and charging cycle: 3.7V 135mAH. 300 times more than 80% working time: 10H standby time: 200H Whether with a microphone: yes – omnidirectional Speaker power and type: 3-7 mW. Electric (moving coil) Material: silicone + plastic (ABS) + hardware + suction iron (N35) Input voltage / current: 5V / 1A