I highly recommend this one: H-163 Bluetooth Music Receiver (Black) | Lazada PH

Buti nga available na sa Lazada to. I got mine from Aliexpress 2 years ago. Wala pa kasi Lazada nuon. Ganyan na ganyan ang akin, as pictured in the Lazada link. H-163 Bluetooth receiver. Take note that there is another Bluetooth receiver on Lazada na color white. Panget sound quality. The black one in the link above, is much better.

I'll vouch for its sound quality. Maarte ako sa sound. Even with FLAC files, I can't tell the difference between Bluetooth and direct 3.5 mm connection.