An All-Conditions active true wireless earphones designed for everyone. Engineered with Freebit™ wing-shaped locks, an award-winning and patented ergonomic solution, for a customized secure-fit so you can move freely without wires. Durability tested together with Hi-Definition sound, the S-FIT provides a motivating listening experience for your daily grind. SPECIFICATIONS Bluetooth Version: 5.0 Bluetooth Range: 33ft Codec: AAC, SBC Frequency Response: 20-20KHz Microphone: Yes Playtime: Up to 6.5 hrs (varies by volume level and content); Up to 33hrs on the go (3 times recharge) Battery: Li-ion Polymer Charging Case: 500mAh Charging Case Dimension: L70.2 x W34.6 x H27.7 (mm) Charging Case Weight: 31g Earphone Weight: 4.8g Earphone Dimension: 224.3W x 17.3H x 20D (mm)