The CBRN Hardened Uplink Module or CBRN/HUL, is an external attachment for ODST and HAZOP helmets.
The CBRN/HUL is available as a helmet accessory in Halo: Reach. The device for the ODST Helmet costs 1000 cR while the one for the HAZOP variant is priced at 2000 cR.
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