eatures: 1. Sweat-proof: Effectively prevent sweat & rain interfering with headset operation 2. T-light Ear Adapter: Ensure long lasting comfort even in rigorous environment 3. Crystal Clear Sound: Special speaking transmits high fidelity & detailed wireless sound to your ears 4. Wind Noise Reduction: Electronic technology blocks out wind noise, improve call clarity 5. Headset: Stereo music-playing Specifications Color Light Blue, White, Black, Red, Red+ Black Size Approx. 1.5x 1.5x 4cm/ 0.59x 0.59x 1.57 Bluetooth Version V4.1 bluetooth Frequency Range 2.4 G Hz-2.48 G Hz Operating Distance Up to 10m (no barrier) Bluetooth Profile A2DP, AVRCP, HSP, HFP Frequency Response 20 Hz-20k Hz Talk/ Music Time Up to 7 hours Standby Time Up to 220hrs Operating Temperature -10℃-50℃ Package Included 1 x Bluetooth 4.1 Headset 1 x USB (Universal Serial Bus) Charger Cable 1 x English User Manual "