Lockdown Collar w Lever Only Clear Casual Wear Multi directional venting Drastically reduces any BO AA77 TOXIC Multi directional venting Drastically reduces any re ventilated fogging this upgrade board comes with our latest Gen 4 code release which includes: Software Features: Fully trigger programmable Switch on the fly firing mode control Our exclusive "Dual Mode" operation (novice pro) No programming "Hot Start" overrides 4 complete player profiles Tune Assist opreation Rule proof tournament modes Trigger Trainer Mode Automatic Eye Fault BPS override logic Manual Eye On Off Control Forced Shot operation 12 Breakout Modes Hardware Features: 80g mechanical micro switch trigger Ultra bright multi color LED 3 stage Battery Level indicator Tournament Lock switch Audio speaker for feedback and alerts 8 Base Firing Modes: Semi Burst mode Reactive mode Full Auto User Defined Ramping PSP3 NXL Millennium Programmable Adjustments: Eyes On BPS Eyes Off BPS BPS Fine tune Capped Firing Enable Disable Trigger Leading Edge Bebounce Trigger Trailing Edge Debounce Trigger Filtering (AMB) Audio Enable Disable Eye Mode Breech Delay ABS Dwell ABS Reset Time Solenoid Dwell Bolt Return Delay User ramping adjustments (5) Burst rounds Reactive rounds Breakout Mode Tournament Mode Group Firing Mode enabler (2) Auto shut off timer The Dye Lockdown Collar with Lever is a great upgrade for your Proto marker or to change up the look of your Dye DM series Threaded feed neck base not included