Features: 1. Bluedio TN2 is an ANC dual microphone active noise canceling Bluetooth headset. 2.170ma large capacity battery, battery life up to 10 hours 3. Bluetooth 5.0 chip transfer rate is higher and faster, the sound quality is highly fidelity. 4. High signal-noise ratio microphone can eliminate 90 noise in life 5. Neck-mounted style allows you to stay comfortable and anti-slip during exercise Specifications: Bluetooth version: Bluetooth 4.2 Working scope: up to 10mbarrier-free space Frenquency scope: 2.4GHZ-2.48GHZ Support protocol: A2DP,AVRCP,HSP,HFP Driving unit: 13mm Impedance: 32ohm Frenquency response scope: 20HZ-20KHZ Sensitivity: 116DB Standby time: about 250 hours Music/calling time: about 12 hours Pure ANC working time: about 9 hours Charging time: about 1.5 hours Working environment: -1050degC Input voltage/current: 5V/＞500mA Output power: 10mW10mW Package List: 1 Pair x Bluetooth Earphone 1 x User Manual 1 x USB Charging cable 6 x Silicone Earcaps