... Product size, material] 18 * 5 * 4.5cm aluminum alloy (to ensure quality) [FM] frequency range 87 ... [Product size, material] 18 * 5 * 4.5cm aluminum alloy (to ensure quality)[FM] frequency range 87.5- ... their own rechargeable lithium battery2: with Tuner3: The new mini-aluminum diaphragm speakers, clear treble, bass pure, unique design, ... charm6: This card reader supports the playing speaker mini speaker