€100

Sennheiser IE 100 pro wireless in ear monitors. These are like new, barely used, just not for me.

Dynamic wireless in-ear headphones
With IE Pro Bluetooth adapter
Impedance: 20 Ohm
Frequency range: 20 - 18,000 Hz
Sound pressure level (SPL): 115 dB (1 kHz / 1 Vrms)
Distortion factor at 1 kHz: < 0.1 % (1 kHz, 94 dB)
Attenuation: < 26 dB
Transducer principle: dynamic
Built-in microphone for conversations
Colour: Black
Includes. 1.3 m cable with 3.5 mm jack plug, 3 sets of silicone adapters (S, M, L), 1 set of foam adapters (M), USB cable USB-A to USB-C, 1 carrying case and 1 cleaning tool