Supports TF card/U disk/MP3 format/FM radio function conversion Supports two power supply modes: 18650 battery (included) and BL-5C lithium battery (not included) Suitable for any age people, especially for the elderly Using large silicone keys, 10 number keys, you can freely choose tracks With a 3.5mm headphone jack, easy to use With a large digital display screen, it is clear at a glance Surface UV paint process, exquisite and durable High-quality speaker, bring loud and good sound With bright LED light, convenient to use at night Specification: Power supply: DC5V Output power: 3W Frequency Response: 150Hz - 20KHz Signal-to-noise ratio: ≥80dB Impedance: 4Ω Output: 3.7V~4.2V+0.09V Input: 5V 5C lithium battery capacity: 600mAh (not included) 18650 battery capacity: 1500mAh (included) Playing time: 4-8 hours Distortion: <10% Material: Plastic Weight: 260g