Bluetooth Wireless Headphone Portable Foldable Wireless Earphones Stereo Earbuds Specification Product Name: KYY-992 Bluetooth Headphones Bluetooth Version: Bluetooth V4.1 Chip: CSR8635 Bluetooth profile: A2DP/AVRCP/HSP/HFP Transimitting Power: Class 2 Frequency Range: 2.402GHZ-2.480GHZ Frequency Response: 50Hz-20KHz Working Distance: up to 10m Battery: Rechargeable Lithium Battery 400mAh Charging input criteria: DC5V-500mA Micro USB Color: Black, grey Compatibility: For Smart Phone, Tablet, PC Features 1. Bluetooth 4.1 : Adopt the international top bluetooth 4.1 CSR chipset, It can create HD audio and a wide frequency, lower power consumption, superior compatibility, compatible for almost all the mobile phone, tablet PC, notebook, any devices with bluetooth function 3. Smart Handsfree Talking : Built-in Concealed High Definition Sensitive Microphone, Support voice dial/redial last number/answer calling/End call/reject calling/call transfer. 4. Pair the headset with 2 mobile phones 5. Foldable Design & Comfortable Wearing Experience: Foldable Design, The Headphone Is Super Lightweight, Based On Ergonomic Design, Headphone Made of Green Leather, Providing You Comfortable Wearing-on Experience. 6. Operating distance: > 10mm without obstruction like building or magnetic field Package list 1 x Bluetooth Headset 1 x USB Charging Cable 1 x User Manual 1 x 3 pairs earbuds 1 x Retail box If you have any further questions,please feel free to contact us at any time!