Features: 1. Extended Touch Screen With Sound Input And Output Functions (ADC, DAC) 2. With Tf Card Slot (Storage Data, Playback Data, Frequency Management) 3. Comes With Tcx0 High-Precision Clock (0.5ppm), The Frequency Is As Accurate As A Walkie-Talkie 4. The New Firmware Automatically Switches To External TCX(You Can See The Clock Source Is External In The Menu) 5. Built-In CR1220 Battery With Clock Function (Records The Current Time When Saving Baseband Files, Supports Offline GPS Simulation 1. Base Material: Nickel 2. Flame Retardant Properties: VO Board 3. Insulating Resin: Phenolic Resin 4. Insulating Material: Organic Resin 5. Insulation Layer Thickness: Thin Board 6. Model: Portapack H2 Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB colour: As Shown Package Contents: 1 x Circuit Board 1 x 2500mah Battery 5 x KEY Buttons 1 x Switch Knob 1 x Speaker Wiring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.