The DSSM is the enhanced, fully digital successor to the SSM, while being IP57 rated for watertightness and offering dock charging capability. The IP57 rating indicates that the unit is protected against dust ingress while also withstanding water immersion up to 1 meter for 30+ minutes perfect for the most demanding work environments. All while allowing for quick battery swap-outs.The DSSM is ideal for theater, TV, film and broadcast environments where concealment and water-resistance is required. The DSSM offers an extensive feature set and performance packed into an exceptionally compact housing, compatible with all current Lectrosonics digital receivers, including the DSQD, DCR822, DSR, DSR4, M2Ra, and DCHR. The DSSM includes specially developed, high efficiency circuitry for extended operating time on the rechargeable LB-50 battery. RF power selections are offered at 10 and 35 mW (D2 compat mode) and a special high density (HDM) mode at 2 mW.Main Features:Extremely compact – ideal for theater and sports broadcastingIP57 rated for moisture resistanceHigh density mode for maximum channel counts in limited spectrumSelectable power; 10 or 35 mW (D2 mode)Offers over 6000 frequencies across a wide UHF rangeTwo-way IR port for easy set-upFirmware updates via USB/Wireless DesignerWide range input gain control in 1 dB stepsDock chargable with optional CHSDSSM unitSpecifications:Operating Frequencies:-537.600 – 607.950 -614.400 – 615.950 -653.050 – 662.950Frequency Selection Steps: 25 kHzRF Power output: Selectable; 10, 35 mW or 2mW (HD mode)Compatibility Modes: HDM or D2 (all models)Frequency Stability: 0.002%Spurious radiation: Compliant with ETSI EN 300 422-1Equivalent input noise: 120 dBV (A-weighted)Input level: Nominal 2 mV to 300 mV, before limiting. Greater than 1V maximum, with limiting.Input impedance:-Mic: 300 or 4.5 k ohm; selectable-Line: 900 ohm-Instrument: 1 M ohmInput limiter: DSP controlled, dual envelope soft limiter with greater than 30 dB rangeGain control range: -7 to +44 dB; digital control, 1 db stepsModulation Indicators: Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulationFrequency Response: 35-20 kHz; 35-15 kHz (HDM compat mode)Low frequency roll-off: Selectable; 35, 50, 70, 100, 120, 150 HzTHD: 0.2% (typical)Controls: Front panel membrane switches with OLED interface for power on/off and all setup and configuration controlsAudio Input Jack: Subminiature; lockingAntenna: SMA connector; coated, flexible wire, length by frequency bandBattery: Lithium-ion 3.6 V 1000 mAH LB50 battery pack (included)Battery Life: 6 hours per charge @ 35 mWWeight: 3.5 ounces (100 grams) including lithium battery packDimensions (housing): 2.59 x 1.9 x .70 in. (66 x 49 x 17 mm)Emission Designator: 110KG1E (HD mode); 170KG1E (D2 mode)