The Blackbird’s foundation-shaking tone comes from 2 DeepSixx humbucker pickups which give the bass a thunderous output, especially since they are wired direct and have an on/off toggle as their only control. There's no volume knob! This Blackbird is either full on or turned off. Another innovative feature is the Opti-Grab™ device, which lets you solidly anchor your hand while picking at the bridge to get that hard drive. The pickguard also features a unique cross over-lay with a classic Thunderbird logo.