Standard Horizon - HX400IS Handheld VHF - Intrinsically Safe - *Case of 20* - HX400ISCASE. The submersible HX400IS intrinsically safe handheld VHF is built to withstand the day-in day-out punishment in hostile commercial environments. Features include a speaker microphone jack, 40 dealer programmable Land Mobile Radio channels with CTCSS & DCS signaling and a unique super bright LED distress strobe light.. Features:. Case of 20. Submersible IPX8/1.5M (4.92Ft) for 30 minutes. Selectable 5 or 1 Wa