Audio Technica ATW-T21 Beltpack Transmitter for Lavalier / Tie Clip or headset Microphone or purely based on the two adjustments an instrument - guitar perhaps?
Matching Audio Technica ATW-R03 Receiver & UK Power Supply.

The radio frequency is VHF 174.5MHz
This frequency is legal to use in the UK licence free.
In some situations VHF gives superior performance to UHF.

The input connector is a 4-pin mini-DIN socket hence the microphone or instrument requires a 4-pin mini-DIN plug with the correct wiring connections.

Delivery by economy courier requiring a signature or Royal Mail ' Signed For ' service to comply with eBay terms to UK addresses only EXCLUDING any form of mailbox or shipping agent.

The courier price listed is for delivery to addresses in the UK excluding those generally classed as outlying or to islands. If you live in one of these areas please choose the Royal Mail Signed For option.

If you buy multiple items / lots I will combine postage.
So long as all items will fit in a box within the size and weight limits of the item with the highest postage cost just a nominal 50p will be added for each additional item/lot.

Wait for me to issue a revised invoice.
Postage can not be retrospectively refunded after payment is made, eBay does not have this facility.
For purchases made by 6pm I will normally issue an invoice the same day.

Despatch will be as soon as practical.
I will not ship to any other country nor to a UK mail box or forwarding, shipping or storage agent.

I respect the majority of buyers are genuine but know there a small minority who misuse the system.
Every buyer who abuses eBay in any way will be reported.