Hamilton Buhl Assistive Listening Dual Frequency System ALS700 with Transmitter, 6 Receivers & Earbuds, Carry Case This Item Includes: Hamilton Buhl Transmitter - 6x Receivers (Batteries) - 6x Earbuds - 6-Way Charging Cable - Carrying Case - Hamilton Buhl 1 Year Warranty System for Tour Guiding, Teaching, Travel, Field Interpretation, Church Listening, Museum 1/4" Microphone input jack; 1/4" Line input jack Power Input: 3dBm Power on/off, audio input gain adjustment and channel selection indicators