Allens comprehensive lineup of hearing and eye protection under the ULTRX brand. From foam ear plugs to electronic eBuds, the ULTRX lineup is a complete solution for hearing protection focusing on the broader needs of hearing protection. From vibrant color pallets to high performing electronics, the Allen ULTRX brand covers all possible formats, functions and sizes.Features :Bluetooth 5.3 for Longer Battery Life and Distance3 Program Settings for Multi-Environmental UsageHybrid-Sound Protection and EnhancementClear Sound and Voice Synthesis OptimizationUSBc Rechargeable Lithium BatteryIPX5 Water Protection RatingAuto Shutdown After 2 Hours in Standby ModeIncludes 2 Sizes of Foam and 2 Sizes of Silicone Inserts for Custom FitNRR 24dB