China Sliding Pneumatic Heat Press Machine factory Bluetooth Earphone in stock Product Description Product NameTrue Wireless Earbuds Model No.TWS Headphones MaterialABS ColourBlack ModelTWS Earphones with charging box support wireless charging TypeTrue Wireless (TWS) Stereo Headphone with wireless charging function wireless charger VersionBT V5.0(CSR)+EDR,Class 2 Operation RangeUp to 10 meters SupportsHSP/HFP/A2DP/AVRCP protocol Frequency Response Range21Hz-18KHZ Up to 10 metersBuilt-in high-sensitivity microphone (-38d Impedance16惟 Sensitivity95dB Degree of distortion鈮?% SNR 鈮?5 Battery 50mAh / 400mAh Rechargeable lithi