TRUEFREE WON'T LET YOU DOWN: Customer is the first priority. TRUEFREE is commited to providing you with excellent experience. Please don't hesitate to contact us if you have any problem or suggestion about the product. We are ready to offer you a satisfactory solution. APP Control & Multipoint Connection: Download the“Truefree" APP on Google Play or the APP store. With Truefree APP, you can easily customise your control function like game mode, adjust the EQ to tune the optimal sound, and update the firmware. Choose the " Dual Device Connection" in the APP, you can connect your devices to two devices, and easily switch music, videos, calls, and more between 2 devices. 45Hrs Ultra Long Playtime & Game Mode Low Latency: With up to 10 hours of play on a single charge and 45 hours of battery life with the charging case, these wireless earbuds provide comfortable, uninterrupted listening. In game mode, wireless earbuds with earhooks can accurately capture the sound of footsteps, gunfire, and other critical audio cues, helping players quickly identify enemy positions and gain a competitive edge. Crystal Clear Calls: Equipped with 4 microphones as well as ENC noise cancelling technology, the earbuds can filter the environmental noise and clearly pick up your voice at the same time during phone calls, zoom meetings, etc. Advanced Bluetooth 5.3& Instant Pairing: With advanced bluetooth 5.3 technology, you can get 2X fast transfer speed (75% higher than the previous generation) and a more stable connection. Open the lid of the charging case, open ear bluetooth headphones will be paired with each other automatically, and just hit on Bluetooth list "Truefree O1" on your device to connect, avoiding complex operations and saving waiting time. Powerful Stereo Sound Effects: TRUEFREE O1 wireless headphones feature large 16.2mm speakers that provide immersive sound with crisp, clear high notes and deep, rich bass. Adopts unique directional sound transmission technology, the sound can be directly transmitted to the ear, improving the traditional sound leakage problems of air conduction headphones, which you can fully concentrate on your music, podcasts, or work without bothering people around you. Open-ear Comfort & Aware Of Danger: The open-ear design of bluetooth headphones helps to achieve true painlessly and harmlessly. No need to put the earbuds in the ear canal, so ears will not feel sore and painful even listening to music for the whole day. These headphones also allow you to hear the surrounding sounds and avoid potential dangers while enjoying your music, especially outdoors, walking on the street or riding a bicycle.