Karambit | Doppler Phase 4 (Kara P4) was added to the game on January 8, 2015, alongside the “Full Spectrum” update. The skin is available in all “Chroma” cases.
The blade of the knife is painted with metallic paints and adorned with a pattern of translucent wavy lines resembling smoke. The color scheme of the skin includes various shades of blue, brown and black creating gradient transitions. The handle remains unpainted.
Float Value of the skin ranges from 0.00 to 0.08, which makes Karambit | Doppler Phase 4 available only in Factory New and Minimal Wear condition. At levels of wear close to the maximum, the knife has several abrasions located in the central part of the blade, on the edges of the ring and on the corner of the blade close to the handle.
The pattern index affects the ratio of colors as well as the location of blue, brown and black areas. Pattern variations with a predominance of blue on the play side of the blade are titled “BTA Blue”. Knives with only blue color on the blade resemble Karambit | Doppler Sapphire and are titled “Max Blue”.
The quality of Karambit | Doppler Phase 4 is Covert. The skin has a StatTrak option and is close to phases 1 and 3 in terms of rarity. The skin belongs to the "Doppler" series.
Due to a relatively low price, Karambit | Doppler Phase 4 became one of the most popular and common skins in the “Doppler” series.