Sennheiser SR-300 IEM G2
Frequency response: 15-25.000Hz
Panorama: Yes
Stereo: Yes
Headphones outputs: Stereo Jack 6.35
Presets: 12
Equalizer: Integrated
RF output power: 10/30 mW

Sennheiser EK-300 IEM G3 C
Frequency response: 15-25.000Hz
Headphones outputs: Stereo Jack 3.5
Synchronization: Automatic transmitter-receiver
Switching bandwidth: 42 MHz – 1.680