Material: ABS PC Color: Black/White Wireless version: V5.0 Communication distance: 10m Standby time: 300 hours Music time: 40 hours [70% of the volume] Battery capacity: 450mAh/3.7V Rated input: DC5V=400mA Rated consumption current: 10mA Charging time: 1.5 hours Frequency response range: 20Hz-20KHz Charge interface: Type-C Compatibility: wireless audio devices Weight: 190g 40mm full range audio unit: The large 40mm diameter full range audio unit offers stunning thick bass and multi-layered 3D audio effect. 40 hours of battery life: The built-in 450mAh high-capacity battery achieves 300 hours of standby time and up to 40 hours of battery life and ensures enough power for using for a week. 10 Meters of stable transmission: The latest Wireless V5.0 chip guarantees high-speed and stable transmission and quick connection after power on. 304 Telescopic rods, solid and durable: The telescopic rods are made of 304 stainless steel, excellent quality and durable. For different groups of people: 7 levels or ergonomic wear design adapt to needs of different groups of people. One-for-two smart design: One pair of headphones can be connected to two devices at the same time, allowing switching between entertainment and calls freely. Portable and folding: Multi-angle rotation folding design is easy to store and carry for daily exercise or travel.