Description: BT 5.4: Connection distance: about 10-15m, stable connection, cordless, portable, convenient, high performanceLanguage Translating Earbuds: Instant translating, support face to face translating of multiple languages with Chinese, and the text and translating of the conversation between the two parties will be displayed on the phone for easy viewing, suitable for cross border meetings and lecturesSize: Each Earbud measures 2.2cmx2.4cmx3.3cm/0.87inchx0.94inchx1.30inch, Headphone case measures 5.4cmx5.4cmx3cm/2.13inchx2.13inchx1.18inchSpecification: Battery capacity: Headphones 3.7V/35mAh; Headphone Case 3.7V/250mAh; Charging: Type C, DC5V-200mA; Playback/talk time: about 5 hours (70% volume); Charging time: about 1.5 hours; Standby time: 90 days; Working temperature: -10-50CPackage Includes: 2 Earbuds in 1 Headphone Case, 1 Charging Cable, 1 Manual Size Chart: Each Earbud: 2.2cmx2.4cmx3.3cm/0.87inchx0.94inchx1.30inchHeadphone Case: 5.4cmx5.4cmx3cm/2.13inchx2.13inchx1.18inch Package Includes: 2 Earbuds in 1 Headphone Case, 1 Charging Cable, 1 Manual Note: Please allow slightly errors due to manual measurement and different monitors.