XT-33 Bluetooth TWS Earbuds with Sporty Secure Fit and Ergonomic Design Features: EXTENDED PLAYTIME - 25 hours of music and talk time at medium volume SPORTY SECURE FIT - Ergonomic design secures earbuds during activity TOUCH CONTROL & BUILT-IN MIC - Control audio tracks and phone calls on the earbuds RECHARGEABLE CASE - Recharge on the go WATER RESISTANT - Sweat, splash, and weather-resistant ACCESSORIES - User manual, USB charging cable, charging travel case, 8 ear cushions in 3 sizes (2 small, 2 large, 4 medium) Specifications: Connectivity technology: wireless Bluetooth: version 5.0 Working distance: 33 ft Charge connector: Micro USB Speaker size: 10mm diameter Frequency response: 20Hz-20kHz Sensitivity: 100dB +/- 5dB Impedance: 32ohms Charging voltage: 5V/1A Case battery: 400mAh Case charge time: 1.5hrs Earbuds battery: 2 x 50mAh Earbuds charge time: approximately 1hr