Patented Audio Reference Companding ensures the clearest sound, with ultra-low noise and no artifacts. Dependable wireless coverage extends over 300 feet (90 meters) of range and eliminates dropouts. Easy to setup and operate, P3TR112GR systems offer one-touch frequency scan and sync to find and assign a clean wireless channel. Adjust the volume and use MixMode technology or stereo mode to create a personal mix from two channels of audio. P3TR112GR systems include SE112 Sound Isolating Earphones for great sound with deep bass and up to 37 dB of ambient noise reduction. PSM300 is available in both an entry-level system for first-time in-ear monitor users and a professional system for rental houses, monitor engineers and musicians needing more advanced options. Features P3R Stereo mode enables adjustment of left/right balance Easy to adjust volume knob and mix control 2 AA batteries provide up to 6 hours of continuous operation Power save mode preserves battery life when earphones are not connected LED indicators for power and battery status Audio output power - 80 mW (per output) Headphone output - 3.5 millimeter (1.8 inches) stereo Slim, lightweight 3.5 ounces frame P3T Single channel, half-rack transmitter with included rack mount kit Sends a stereo or mono mix wirelessly to performers onstage Rock-solid wireless connection to P3R receiver over 300 feet (90 meters) range One-touch IR sync instantly links transmitter to receiver Up to 30 mW output power (region dependent) 24 MHz tuning range (region dependent) ¼ Inches (6.3 millimeters) TRS balanced inputs and loop outputs High-contrast LCD menu with detailed L/R audio output meters Detachable antenna External power supply Selectable line/aux level SE112 sound isolating earphones with dynamic microdriver Great deep bass sound and impressive sound isolation. Sound Isolating sleeves in multiple sizes block outside noise up to 37 dB and Secure & comfortable fit.