The BLX288/SM58 Wireless Dual Vocal System combines simple wireless setup, professional-grade performance, and two SM58 industry-standard vocal microphones to deliver warm and clear vocal reproduction.System Includes: BLX2: (2) Handheld transmitter with SM58 cartridge. BLX88: Dual channel receiver with microprocessor-controlled internal antenna diversity.BLX2 Main Features:Integrated microphone capsule design, featuring PG58, SM58, or Beta 58A options.Lightweight, rugged constructionColor ID caps (available separately)BLX88 Main Features:XLR and ” output connectors vMicroprocessor-controlled internal antenna diversityTwo-color audio status indicator LEDGreen: Normal audio levelsRed: Excessive audio levels (overload / clipping)BLX2 Specifications:Audio Input Level gain 0dB: -20 dBV maximum -10dB: -10 dBV maximumGain Adjustment Range 10 dBRF Transmitter Output 10 mW, typical varies by regionDimensions 224 mm X 53 mm dia. (8 7/8 X 2 1/8 in.)Weight 218 g (7.7 oz.) (without batteries)Housing Molded ABSPower Requirements 2 LR6 AA batteries, 1.5 V, alkalineBattery Life up to 14 hours (alkaline)BLX88 Specifications:Output Impedance XLR connector: 200 6.35 mm (1/4) connector: 50 Audio Output Level Ref. 33 kHz deviation with 1 kHz toneXLR connector: 27 dBV (into 100 k load) 6.35 mm (1/4) connector: 13 dBV (into 100 k load)RF Sensitivity -105 dBm for 12 dB SINAD, typical Image Rejection >50 dB, typicalDimensions BLX4: 40 mm X 188 mm X 103 mm (H x W x D) BLX88: 40 mm X 388 mm X 116 mm (H x W x D)Weight BLX4: 241 g (8.5 oz.) BLX88: 429 g (15.1 oz.)Housing Molded ABSPower Requirements 1215 V DC @ 160 mA (BLX88, 320 mA), supplied by external power supply (tip positive)