Packaging box size: 201x136x177mmWeight 750G Box size 16 pieces/12kg/56.5 * 37 * 41.5cm 1. Full interface: High compatibility includes 3.5 audio, coaxial, fiber optic, RCA audio. Compatible with all televisions on the market. No matter what TV interface the customer has, it can be used to provide them with a better experience without worrying about compatibility issues 2. The base is equipped with a display screen, display interface, and battery level. The screen displays battery level and TV interface, allowing customers to see the headphone battery level and whether the interface is properly connected 3.2 charging methods, earphones automatically turn on after 5 seconds of leaving the machine. Customers can choose their own suitable charging method, directly place them on the base for charging or use a USB cable. The automatic power on function makes it more convenient for customers to use, without having to operate the power on themselves   Specifications: Transmitters: Voltage: DC 5V/1A Working current: 80mA Modulation: 50Khz Mode: Stereo Working range: 100 feet (30 meters) Earphones: Voltage: 3.7V (450mAh builtin rechargeable battery) Working current: 55mA Working hours: around 8 hours Charging time: 4 hours Signal to noise ratio: ≥ 60dB Distortion: ≤ 1% Frequency response: 60-15000Hz Package details: Earphones * 1 Transmitter * 1 5V/1A charging head * 1 USB to DC head charging cable * 1 1.5M audio cable (with shielding function) * 1 RCA cable (with shielding function) * 1 Coaxial line * 1 Fiber optic cable * 1 Type-C USB charging cable * 1 User manual * 1