•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: