The Lehle Sunday Driver II is a high-end preamp, buffer, and booster designed for guitarists. It offers the following key features:

1. High-quality Preamp: It features a discrete Class-A input stage, providing a clean and studio-quality sound.

2. Buffer and Booster Modes: You can choose between "D" (Driver) mode, which amplifies your guitar signal without modification, and "S" (Sunday) mode, which increases input impedance, adding warmth and character to your guitar sound.

3. Adjustable Boost: The pedal can boost your signal by up to +18 dB without introducing noise or distortion.

4. Balanced Output: It can be used as a DI box with phantom power support for stage use or as a high-end preamp in the studio. The balanced output provides versatility in different applications.

5. Gold-Plated Switches: The pedal features gold-plated contacts for reliable and loss-free signal switching.

6. Voltage Boost: The input voltage is rectified, filtered, stabilised, and boosted to 30V to maximise valve amp dynamics.

7. Dynamic Range: Thanks to its 30 V technology, it offers an exceptional 130 dB dynamic range, allowing for detailed and clear sound reproduction.

8. Adjustable Gain: The gain control allows you to fine-tune your volume or distortion settings easily and maintains its settings during performances and transport.

9. Broad Frequency Range: It has a wide output range from 20 to 100,000 Hz, making it suitable for various applications.