The photo shows the oval marking stamp inside the body of the Enya X3 Pro transacoustic guitar (serial/batch number 3122B105). The official price of the Enya X3 Pro model on Amazon is $449.99 (for the full-size 41″ version) and $399.99 (for the compact X3 Pro Mini 36″ version). Key specifications: Body and neck material: 100% carbon fiber with a 3-layer weave top deck. Pickup and electronics: Smart Enya SP1 AcousticPlus 2.0 system with a built-in actuator for built-in effects. Size and scale: 41 inches (4/4), nut width — 1-11/16″ (43 mm), scale length — 25-3/4″. Nuts and strings: Tusq nuts, D’Addario XS strings (12-53). Power: 2600 mAh lithium-ion battery with charging via USB Type-C port. Key advantages: Environmental resistance: The carbon body is resistant to temperature and humidity fluctuations, does not dry out or crack unlike wood. Built-in effects without connection: The AcousticPlus system uses the guitar body as a resonator, allowing you to play with Reverb, Delay, and Chorus effects directly "dry" without a combo amplifier. App and Bluetooth connectivity: You can adjust the equalizer and effects via the mobile app, and also send backing tracks via Bluetooth directly into the guitar body. Elevated Neck: The neck is mounted in a console style without touching the top deck, which increases resonance and sustain of the upper panel. Direct recording (OTG): The Type-C connector supports the OTG interface for recording sound directly to a smartphone or computer. With delivery from Amazon, it cost $650 USD. Selling due to relocation. $400 Condition like new. Purchased about a year ago.