Handheld transmitter with mute switch.
Frequency range: A (516 -558 MHz)

Features:

1680 tunable frequencies within 1785-1800 MHz range for interference-free reception
Enhanced frequency bank system with up to 12 compatible channels
Pilot tone squelch for eliminating RF interference when transmitter is turned off
Enhanced AF frequency range
Increased range for audio sensitivity
Wireless synchronization of transmitter via infrared interface
User-friendly menu operation with more control options
High-contrast LCD display
Auto-Lock function avoids accidental changing of settings
HDX compander for crystal-clear sound
Transmitter features battery indication in 4 steps
Handheld transmitter compatible with easy-exchangeable microphone capsules from evolution series
Contacts for recharging BA 2015 accupack battery directly in the transmitter
Wide range of accessories adapts the system to any requirement

Specifications:

Modulation Wideband FM
Frequency Range A: (516 to 558 MHz)
Transmission Frequencies Maximum 1680 receiving frequencies, adjustable in 25 kHz steps
20 frequency banks, each with up to 12 factory-preset channels, no intermodulation
1 frequency bank with up to 12 programmable channels
Switching Bandwidth Up to 42 MHz
Nominal/Peak Deviation ±24 kHz / ±48 kHz
Frequency Stability ≤ ±15 ppm
RF Output Power Maximum 30 mW at 50 Ohms
Pilot Tone Squelch Can be switched off
Compander Sennheiser HDX
AF Frequency Response 80 Hz to 18 kHz
Signal to Noise Ratio ≥ 110 dBA (1 mV, peak deviation)
Total Harmonic Distortion (THD) ≤ 0.9%
Maximum Input Voltage 3 V eff
Input Impedance 40 kOhms
Input Capacitance Switchable
Input Sensitivity Range 48 dB, adjustable in 6 dB steps
Temperature Range 14 to 131°F (-10 to 55°C)
Power Supply 2 x AA batteries, 1.5 V or BA 2015 accupack
Nominal Voltage 3 V battery / 2.4 V rechargeable battery
Current Consumption At Nominal Voltage: Approximately 180 mA
With Transmitter Switched Off: ≤ 25 µA
Operating Time Typically 8 hours
Dimensions (W x L x H) 2.0 x 10.4 / 50 x 265 mm
Weight 15.9 oz / 450 g

Sennheiser SKM 100 G4SA (Sennheiser SKM100G4SA)