S4000 Foldable Wireless Stereo Music Headset with Mic 3.5mm AUX-in / TF Card / FM

Features:1. Equipped with features of BT connection, TF card music playing, AUX-in wired music playing, FM radio, and hands-free call with Microphone.2. With BT4.2 function, easy to pair with almost all the BT-enabled audio devices, freely to enjoy wireless music and hands-free calls.3. Connect to the audio devices (such as MP3/MP4, Laptop, etc) without BT function the included 3.5mm cable.4. Built-in 250mAh rechargeable battery lasts up to 10 hours of music playing time per charge cycle.5. Adjustable headband length, foldable soft leather ear cushion, comfortable to wear, and easy for storage.6. HD microphone reduces ambient noises and grasps the detail of voice. You can get high-quality hands-free phone conversation.Specifications:1. BT version: 5.02. Operation range: 10 meters (no obstacle)3. Frequency response: 20Hz-20KHz4. Impedance: 32ohm5. Sensitivity: 108+/-3dB6. FM frequency: 87.5-108MHz7. Speaker unit: 40mm8. Battery capacity: 250mAh (depends on music volume)9. Working time: