Studio Monitors & Speakers
Nux B-7PSM
Nux B-7PSM, Digital 5.8 GHz Wireless In-Ear Monitor System, Simple and uncomplicated plug-and-play application, Compact body pack can be attached to the belt or strap of the instrument, Frequency range: 20 Hz - 19 kHz, Sample rate: 24bit/ 40 kHz,...
https://www.bizrate.co.uk/musicalinstrumentmonitors_speakers/nux-b-7psm-oid28159149387.html