SpecificationsErgonomic earbuds Twin Completely Wireless Featherweight earbuds Can Use One Earbud (Mono) or Both (Stereo)Portable Recharging Case with Advanced Lithium battery inside Bluetooth connection V5.0True Wireless Stereo Earphones Bluetooth connection V5.0 Wireless Range: 10m (30 Ft.)Operating range up to 10 meters Music format: MP3 /WMA /WAV /APE /FLACBattery Capacity: 460mAh (Case), 80 mAh (Earbuds) Playing Time: 12 hours on Full Charge ( 3x Charge Cycles).Fast Recharging time 1.5 hours Dual Microphones built-in Touch Controls (Both Earbuds)Custom Fit Silicone Tips Included in 3 sizes (S,M,L) Compatible with Android, iOS andWindows devices Dimensions carrying case: 71.5 x 30.9 x 31.7 mm (length, width, height)Weight charging case: 40g approximately Headphones weight: 5.2g x 2 approximatelyHyper bass Quality Power of 2x6W RMS Earphone Driver Audio Frequency Range: 50Hz-20,000Hz