QY11 is stereo bluetooth earphone of QCY which provides design include earphone buffer so that the position is more stable and powerful sound. With feature sweatproof and light, very suitable to be a partner in any of your activities. Specifications: Weight: 18.5 g Size: 36 x 30 x 45 mm Bluetooth Version: Bluetooth V4.1 Protocol: HFP / A2DP / HSP / AVRCP Bluetooth Chip: CSR Transmission Distance: 10 m Battery capacity: 90 mAh Charging Time: 2 hours Music time: 5 or 7 hours Frequency Response: 20-20kHz standby time: 180 hours Microphone: Yes Warranty: 1 year Authorized Distributor Excellence & gt; Earphone equipped with an earloop = To provide security that are not easily separated from your ear & gt; Design speaker stereo acoustic dynamic TWS = Makes you have the best sound experience. & Gt; Waterproof earphones with classmates IPX2 = Makes it more fitting to be a friend of your sport & gt; Earbuds made of rubber silica soft and bervarian = Gives you the convenience to be used to linger QY11 Package Include: (1) QCY QY11, (1) USB Charging Cable, (1) Pairs Earmuff (1) Manual QCY Official Store imported products PT DELCO JAYA (the sole distributor), own Postel & amp; Service Center only buy in the store & amp; authorized dealer of our * Bluetooth Earphone QCY can be used on: All mobile phone / smartphone to feature Bluetooth (iphone, android, etc.), PC, Notebook ** Via Go-Send Order to be served on Monday - Saturday At 9:00 a.m. to 14:00 ** ** Delivery of goods every Monday-Friday from 9:00 to 16:00 and a special Saturday 09.00 - 14.