10mm Aluminum Alloy diaphragm dynamic drivers Magnetic Fluid Driver Technics Acoustic Control Chamber and Harmonizer Direct Mode for pure sound Support SBC, AAC, LDAC, LC3 technology ~ Support Android and iOS (Whatsapp and Wechat message notifications) Bluetooth Version：v5.3 Bluetooth Profile: SBC, AAC, LDAC, LC3 Freuqncy Response:20 Hz - 40 kHz (LDAC 96 kHz/990 kbps) Battery Charge Time:Approx. 2 hrs Accessories: Earphones x1pair, Charging case x1pc, Earpieces set x5 set EAH-AZ100 ~ • Return and refund are not accept. • Free shipping to HK/Macau when spending over $500 onwards • China area shipping fee $130 + Local SF Express • Two business day shipping. Sent via SF express / JD Logistics • Exchange of defective units purchased in 7 days ~ *Photo for reference only