Type : Around-Ear
Wireless Range : Up to 96.9 m (320')
Transmitting Frequency Range : 2.4-2.8GHz, Auto-Selecting
Impedance : 32 Ohms
Sensitivity : 106dB
Power - Headphones : Rechargeable Batteries, Transmitter : AC Power
Connectors : 3.5mm Stereo Plug with 1/4" and RCA Adapters
Dimensions (WxDxH) : Not Specified by Manufacturer
Weight : 216g (7.6 oz) (Without Batteries)

TX 180 Transmitter
AC Wall Adapter (Multi-Country)
Audio Cable with Adapters
2 x Rechargeable AAA Batteries
Sennheiser RS 180 Instruction Manual