True wireless. Sweat proof IPX4. Voice assistant compatible. Up to 5 + 10 (charging case) hours battery life. Instructions side. Designs and specifications are subject to change without notice. Specifications: Bluetooth ver. 5.0. Power Supply: Built-in lithium polymer chargeable battery. For some mobile phones, you may not be able to use some or all functions depending on the specifications of the mobile phone itself. Accesories: 3 size ear pieces (S, M, L). Charging cable (micro USB). Charging case. CE listed. This device complies with part 15 of the FCC Rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Eco-friendly less-plastic package. SGS: Energy efficiency. Made in China. Designed in Japan.