Syllable D700 Portable Lightweight Wireless Stereo with Built-In Microphone Sports/running & Gym/exercise Bluetooth 4.0 Earbuds Headphones Headsets for Smart Phones Devices (Yellow)

FEATURES Sporty idea injected, light in weight and easy to carry Ergonomical design, comfortable like you are wearing nothing Two wearing ways at your choice with adjustable headband Detailed voice instruction guiding your operation Rubber coating, comfortable to wear Superb sound quality Built-in microphone SPECIFICATION Bluetooth version: V4.1 Frequency range: 2.4GHz - 2.48GHz Operating distance: up to 10m (free space) Standby time: up to 180hrs Talking/music-playing time: about 4~5 hours Charging time: about 1~2 hours Bluetooth profiles: A2DP, AVRCP, HSP, HFP Frequency response: 20 -22kHz Operating Temperature:-10°~50°C Note: Please wearing right earphone in right ear and left earphone in left ear , which will be more comfortable and stable. Notice: This is not a real bass earphone