FiiO has designed their Cassette Player CP13 with large oval buttons for playback controls (play stop rewind fast-forward) on one side while down the other side you will find a sleek volume dial a USB-C port for charging a 3.5mm headphone input and a status LED. Full Analog Circuit 100% Pure Analog Sound To authentically reproduce analogue signals CP13 employs analogue devices from signal collection to amplification creating a fully analogue circuit that faithfully reproduces classic analogue sound. Classic Reproduction Audiophile Op-Amp JRC5532 CP13 incorporates the imported audiophile op-amp JRC5532 a classic reproduction known as the "king of op-amps." Coupled with the all-analogue circuit processing it delivers familiar melodies with a lingering and nuanced sound. Fusion of Form and Function Dual-tone Full Aluminium Alloy Casing Crafted meticulously with full aluminium alloy CP13s dual-tone casing showcases a seamless blend of form and function with a "zero" visible screws design enhancing both texture and aesthetics. Additionally the buttons use a tough oxidation process ensuring durability and corrosion resistance. The aluminium alloy volume knob features a large-sized analogue volume potentiometer offering better stability reliability and an improved adjustment feel compared to regular cassette players using flatter potentiometers. Long-lasting Battery Life 13 Hours of Continuous Playback CP13 features a high-capacity 1800mAh lithium battery providing more power and a longer lifespan offering over 13 hours of continuous playback and an outstanding standby time of over 268 days. Dual-mode Power Supply Uninterrupted Enjoyment CP13 is equipped with a dual-mode power supply design supporting both battery and Type-C charging. Connecting to a 5V power adapter enables charging with mature charging power supply and overvoltage protection circuits for added peace of mind. More colour options to be released later on: