Features Powerful plug-on transmitter, easily mounted on any kind of microphone Excellent sound and construction quality Easy to use and fast setup time Powerful and reliable wireless transmission Range: up to 100 meters / 330 feet Up to 8 hours of operation time Specifications Frequency range: AS: 520 - 558 MHz Dimensions: Approx. 105 x 43 x 43 mm Compander: Sennheiser HDX THD, total harmonic distortion: = 0.9 % Weight: approx. 195 g Signal-to-noise ratio: = 110 dBA RF output power: Max. 30 mW Switching bandwidth: up to 42 MHz Peak deviation: ±48 kHz Nominal deviation: ±24 kHz Operating time: Typically 8 h Modulation: Wideband FM Power supply: 2 AA batteries, 1.5 V or BA 2015 accupack Current consumption: at nominal voltage: typ. 180 mA with transmitter switched off: = 25 µA Input impedance: 68 kO, unbalanced Max. Input voltage: 3.3 Veff Powering: 3 V battery / 2.4 V rechargeable battery Transmission frequency: Max. 1680 transmitting 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 AF frequency response: 80 – 18,000 Hz Temperature Range: -10 °C to +55 °C Frequency stability: = ±15 ppm What's in the box SKP 100 G4 plug-on transmitter 2 AA batteries quick guide safety guide manufacturer declaration sheet Watch: Evolution Wireless G4 Tutorial – An Introduction I Sennheiser