Casio ER-100 Open-Ear Earphones Launch with Sound Leakage Cancellation

Casio announced the ER-100 open-ear wireless earphones on May 19, 2026. The earphones use an ear-cuff design and feature active noise cancellation to reduce sound leakage.

Active noise cancellation reduces leakage

The ER-100 supports Bluetooth 5.4 and the SBC, AAC, and aptX codecs. Battery life reaches up to 9.5 hours in listening mode and up to 14 hours in streaming mode. Each earbud weighs about 8 grams and has an IPX4 water resistance rating.

The earphones are priced at 49,940 JPY (about $315) in Japan. Sales begin on May 28, 2026.

Casio claims the ER-100 effectively cancels sound leakage by superimposing opposite phase sound. The design also reduces howling by preventing leaked sound from being picked up by the microphone.