Compared to other electronics, the earbuds are low power products. Hence for charging safety, please make sure the charging current is no greater than 5V 1A. Please do not use fast charger. Long term use an inappropriate adapter to charge will damage the case. If the case and earbuds are damaged by using an improper adapter, this kind of man-made damage is not covered by the warranty. Description Features: [Bluetooth 5.2 & QCC3040 Chipset] Adopt advanced Bluetooth 5.2 and built-in high-tech QCC 3040 chipset, SoundPEATS Sonic is compatible with all the Bluetooth devices enable with Bluetooth 4.0 or above and provides you truly wireless enjoyment with seamless connection and lower consumption. You can choose either earbud at a time for calls or music, switch freely between single and twin mode. [Immersive Bass & Clear Call] To bring you an unparalleled audio feast, SoundPEATS Sonic wireless earbuds adopt low frequency enhancement technology and latest aptx-adaptive audio decoding technology to deliver fantastic immersive sound with powerful bass. Combined with Qualcomm CVC 8.0 noise reduction functionality, you’ll experience a whole new world of crystal-clear phone calls. [35 Hrs Playtime & USB-C Charge] Taking with SoundPEATS Sonic bluetooth earbuds, you can enjoy music wherever you go as it offers up to 15 hours playtime on a single full charge and pocket sized charging case extends playtime up to 35 hours and supports up to 2 full charges for the earbuds, it only takes 1.5 hrs to charge the case with type-C quick charge. [TrueWireless Mirroring & Game Mode] The advanced TrueWireless Mirroring technology aims to maximize the connection stability and reduce the audio interruption under the poor radio frequency circumstance, you will feel no signal loss or music dropouts during listening and calling no matter indoor or outdoor. The game mode minimizes the delay to ensure the synchronization of the game audio and picture (Triple tap MFB on left earbud to enter the Game mode). [Easy Control & Comfortable Fit] Compared to the smart touch control, the sensitive button control provides more precise control for what you want. Softly tap on the earbud to skip songs, adjust volume, answer/reject calls and activate Siri without picking up your phone. In-ear ergonomic design and three different sizes of eartips bring you most comfortable wearing. Specification: 1.Sensitivity: 94±3dB 2.Resistance: 16Ω 3.Frequency Response Range: 20-20000Hz 4.Codecs: SBC、 APTX、 APTX-adaptive 5.Active Noise-Cancellation: No 6.Bluetooth Version: Bluetooth 5.2 7.Bluetooth Prole: HSP 、HFP 、 A2DP、AVRCP 8.Bluetooth Chipset: QCC3040 9.Maximun Working Range: 33feet/10m(no abstacle) 10.Playing Time: About 15 Hours (volume at 60%) 11.Earbuds Charging Time: About 1.5 hours 12.Case Charging Time: 1.5 Hours 13.Charging Case Recharge Earbuds: 2 times 14.Earbud Power Capacity: 70mah 15.Charging Case Power Capacity: 400mah 16.Earbud Dimension(L*W*H): 0.72*0.8*1.07in/18.3*20.5*27.2mm 17.Charging Case Dimension(L*W*H): 61*38.95*34.71mm 18.Waterproof Rating: IPX5 Package included: 1.2x SoundPEATS Sonic Bluetooth Earbuds 2.1x Type-C Charging Cable 3.1x Charging Case 4.6x Interchangeable Ear Tips 5.1x User Manual