Hands-free phone: Support speakerphone, built-in microphone to give you clearer calls. Perfect for single or group phone calls and video chats. Sustained power, long battery life: Two power modes are available with a built-in lithium secondary battery. With a playback capacity of 3-5 hours at medium volume, it is suitable for all occasions. Pure music: High-fidelity sound, stereo speakers, built-in resonance radiator device, equipped with a high-efficiency amplifier, extremely low-frequency dynamics, rich deep sound, flexible, achieving impressive deep bass effect. Simple and easy operation: Passed more than 10,000 touch tests, wear-resistant, temperature-resistant, long-lasting.