Based on the one year old top-of-the-line MDR-EX700SL, the MDR-EX300SL is a high-end dynamically driven earbud from Sony. Based on a smaller 13.5mm driver compared to the EX700SL's 16mm version, the EX300SL adopts the same multi-layer diaphragm technology and hybrid silicon tips for a comfortable fit. A North American release date or MSRP has not been announced. The Japanese MSRP is 6,195 yen ($60 US), around half of the more advanced EX-500SL that was launched at the same time. The EX-300SL comes in blue and red.