Use it in factories, museums, power plants—anywhere hearing assistance is needed. System includes one T1-216 transmitter with MIC 086 microphone, six R1-216 receivers with HED 021 headphones, belt clip cases, batteries and system carry case. System operates on 216 MHz bandwidth. Applications: • Group Tours • Destination Marketing Organizations • Cruise Ships • Tourism Offices University Tours • Large-Scale Guide PPA T1-216 Transmitter: Dimensions: 3-5/8" L x 2-3/8" W x 7/8" H (92.1 mm x 60.3 mm