From Walrus:

The first in the Mako series, the D1 is a powerful multi-function delay with five, studio grade, high-fidelity, custom tuned programs. The programs are Digital, Mod, Vintage, Dual and Reverse. Each can be tuned and tweaked with modulation, tone, age, and subdivisions. The attack knob adds another dynamic to each program, opening up a new world for creating soundscapes. The D1 boasts stereo in and out, midi control and on-board presets. A workhorse of a delay that is just as ready for the road as it is the studio.

Each program can be fully customized to your taste and playing style with the Tweak knob. Flip the toggle switch to Mod to bring in a tasteful modulation to your delay trails. Tone will brighten or darken your delay trails. Age will add some grit and wear reminiscent of vintage delay units. Subdivisions can be easily changed between quarter, eighth and dotted eighth.

The Attack knob will soften the attack of the echoes. Dreamy and ethereal soundscapes can be created with higher repeat and attack settings.

• The D1 comes in an anodized silver finish with black, dark green, red, orange and purple ink. 
• The enclosure’s exact size with knobs is 4.9” x 2.52” x 2.64”. Power requirements are 9VDC (300mA minimum).
• The use of an isolated power supply is recommended for powering all Walrus Audio Pedals. Daisy chain power supplies are not recommended. Power supply not included.