Technical specifications Part no: 46002-001 Style: Headband Weight: 382 g Unit pack: Box Masterbox qty: 10 SNR: 30 Batteries: 2×1,5 V AA (up to 120 hours of use) Sound reproduction: Stereo Max. input level: 263 mV Sound level limit: max 82 dB Radio frequency range FM: 88-108 MHz, AM: 540-1700 KHz Amplicfication: max 8 dB (primarily in freq. range 500-3k Hz – human speech) Applications: Agriculture & Farming, Building & Construction, General Contracting, Landscaping etc.