JBL Free truly wireless in-ear headphones deliver JBL Signature Sound in an intuitive, yet intelligent package. Completely free from wires and easy to use, the JBL Free is your flexible companion for calls, music and an active lifestyle. You get 24 hours of combined playback: 4hrs of continuous listening on the headphones plus 20 hours of backup from the smart charging case. Comfort Stay Secure Fit ergonomics with 3 ear-tip and 2 gel sleeve sizes provide a tailored fit for all day wear and active use. The splashproof worry free IPX5 certified design keeps the music playing through sunshine and rain. Step up your listening experience in three easy ways: (1) use one earbud for calls, (2) use two earbuds for immersive music and (3) add the gel sleeves for secure fit during workouts. Product model: for JBL FREE X8 Wireless connection Blue tooth: 5.0 Blue tooth protocol: HFP/A2DP/ HSP/AVRCP Communication distance: 10 meters (accessible environment) Dual headphones continuously listen to songs for about 4 hours Headphone standby time: about 150 hours Single earphone battery capacity: 40mAh Charging box battery capacity: 300mAh Headphone charging time: about 1.5 hours Charging box charging time: about 2 hours Single earphone net weight: about 4.1g Total net weight with charging box: approx. 35.4g Charging box size: 62 × 40 × 27.2mm Headphone size: 26.65 × 16.4 × 21.6mm Wireless connection Blue tooth: 5.0 Blue tooth protocol: HFP/A2DP/ HSP/AVRCP Communication distance: 10 meters (accessible environment) Dual headphones continuously listen to songs for about 4 hours Headphone standby time: about 150 hours Single earphone battery capacity: 40mAh Charging box battery capacity: 300mAh Headphone charging time: about 1.5 hours Charging box charging time: about 2 hours