The SSM is ideal in theatrical or any other production where concealment in costuming is required. In spite of its tiny size, the transmitter offers an extensive feature set and performance on par with all of the Digital Hybrid Wireless* models.Frequencies are selectable in 100 kHz or 25 kHz steps across a maximum tuning range of 76.7 MHz. This yields a total of 3072 available frequencies across three standard frequency blocks. The tuning range varies in some blocks to meet applicable frequency allocations.Power is provided by a rechargeable Lithium-ion battery. The formed stainless steel battery door latches closed securely, and cannot be jarred open accidentally. The servo bias input accepts mic or line level signals with a wide range of gain adjustment in 1 dB steps. Accurate LED indications on the keypad allow precise gain adjustments to be made for the maximum signal to noise ratio and minimum distortion. The limiter in the preamp can cleanly handle signal peaks over 30 dB above full modulation, allowing the input gain to be set high enough to achieve the maximum signal to noise ratio, yet provide protection against input overload.Compatibility with earlier analog Lectrosonics receivers, Lectrosonics IFB receivers and some receivers from other manufacturers is provided by DSP emulation modes selected in the LCD menu.The housing is constructed of machined aluminum, finished with an ultra hard, black electroless nickel finish called ebENi..Main Features:Tunable across three standard frequency blocks (76.8 MHz)Digital Hybrid Wireless audio for compandor-free digital qualitySelectable 25 or 50 mW RF powerCompatibility modes for use with analog receivers25 or 100 kHz tuning steps for up to 3072 selectable frequenciesWide range input gain control in 1 dB stepsQuick change Lithium-ion rechargeable batteryAudio coupled remote controlSpecifications:Operating Frequencies:Block A1: 470.100 – 537.575Block B1: 537.600 – 614.375Block C1: 614.400 – 691.175Block D1: 691.200 – 767.975 (export only)Frequency Selection Steps: Selectable; 100 kHz or 25 kHzRF Power output: Selectable; 25 or 50 mWPilot tone: 25 to 32 kHz; 5 kHz deviation (Digital Hybrid mode)Frequency Stability: 0.002%Deviation: 75 kHz max. (Digital Hybrid mode)Spurious radiation: 60 dB below carrierEquivalent 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; selectableLine: greater than 100 k ohmInput limiter: DSP controlled, dual envelope soft limiter with greater than 30 dB rangeGain control range: 44 dB; digital controlModulation indicators: Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulationAudio Performance (Digital Hybrid mode)Frequency Response: 70 Hz to 20 kHz (+/-1dB)Low frequency roll-off: 12 dB/octave; 70 HzTHD: 0.2% (typical)Controls: Side panel membrane switches with LCD interface for power on/off and all setup and configuration controlsAudio Input Jack: LEMO 00 Series 3-pinAntenna: Galvanized steel, flexible wireBattery: Lithium-ion 3.7 V 800 mAH DLF40 battery packBattery Life: 4 hours per chargeWeight: 2.3 ounces (65.2 grams) including lithium battery packDimensions (housing): 2.3 x 1.5 x .56 in. (58.4 x 38 x 14.2 mm)Emission Designator: 180KF3E