The Lehle Sunday Driver SW II is a versatile high-end preamp, buffer, and booster pedal designed for electric and acoustic instruments. It offers the following features:

1. High-End Design: The pedal is built with high-quality components and a discrete Class A input stage, ensuring top-notch audio quality.

2. Voltage Boost: The input voltage is rectified and boosted to 30 V internally, ensuring it can work well with tube amplifiers.

3. Dynamic Range: It boasts an impressive 130 dB dynamic range, thanks to 30 V technology, which helps maintain signal clarity and dynamics.

4. Two Sound Modes: You can choose between two sound modes: "D" (Driver) mode preserves your guitar's original signal with high input impedance, and "S" (Sunday) mode enhances warmth and character with increased gain.

5. Switchable Boost: The pedal features a switchable boost function with up to +18 dB of gain.

6. Operation Modes: You can choose between Buffer and True-Bypass operation modes to suit your setup and signal routing needs.

7. Balanced Output: The balanced output can also function as a DI (Direct Injection) box, making it suitable for studio and live applications.

8. Reliable Switching: The pedal uses a microcontroller and an intelligent True-Bypass-Relay-Circuit with active pop suppression to provide fast, noise-free, and wear-free switching.

9. Clean Operation: Even with the maximum +18 dB gain setting, the pedal remains clean and free of background noise.

10. Flexible Gain Control: The gain controller allows for easy adjustment of volume and distortion, featuring black anodised aluminium knobs for precise control.