The Jen KPS 900 Phaser is a vintage guitar effects pedal known for its analog phasing capabilities. Here's an overview of this pedal:

**Brand and History:**
- **Brand:** Jen (short for Jennings Musical Industries) was a British company that produced musical instruments and effects in the 1960s and 1970s.
- **History:** Jen was associated with producing budget-friendly versions of popular pedals, making them more accessible to a wider audience.

**Jen KPS 900 Phaser:**
- **Type:** Phaser.
- **Analog Design:** The KPS 900 is an analog phaser, delivering warm and organic phase-shifting effects.
- **Vintage:** The pedal is considered vintage, having been produced during a time when analog effects dominated the market.
- **Controls:** Typically features controls for Speed (or Rate) and Depth, allowing users to adjust the speed and intensity of the phasing effect.
- **Enclosure:** Housed in a compact enclosure, characteristic of many vintage pedals.
- **Sound Characteristics:** Known for producing classic analog phaser sounds with a distinctive sonic character.

**Availability and Collectibility:**
- **Availability:** Being a vintage pedal, the Jen KPS 900 may not be readily available as a new product.
- **Collectibility:** Vintage Jen pedals, including the KPS 900, can be sought after by collectors and enthusiasts interested in classic analog tones.

**Note:** Vintage gear, including pedals like the Jen KPS 900, may have varying conditions, and their availability in the market can be influenced by factors such as rarity, condition, and historical significance.

For those interested in the vintage analog sound of classic phasers, the Jen KPS 900 remains a piece of musical history, reflecting the design and sonic characteristics of its era. If you're considering acquiring one, you may want to explore reputable vintage gear marketplaces or consult with vintage gear experts to ensure you get an authentic and well-maintained unit.