The Sony WH-CH520 tick most of the boxes for an on-ear pair and in some areas punch above their price point.
An on-ear headphone with plenty of features
Sony WH-CH520 review: Comfortable wireless headphones with incredibly long battery life
Press Releases Sony Asia Pacific
Sony WH-CH520 Review - Big Sound, Small Price! — WhatGear, Tech Reviews
Sony WH-CH520 Headphone Review - Consumer Reports
Sony WH-CH520 review - SoundGuys
Sony WH-CH520 Review : The Affordable Audio Marvel : r/GigFinds
Sony WH-CH520 review: Attractive on-ear headphones
On-Ear Headphones for the gym: Sony WH-CH520 review : r/HeyNewGadget
Sony WH-CH520 review - SoundGuys
Sony WH-CH520 review: some of the best cheap headphones you can buy - TECHTELEGRAPH