240 grams is twice as heavy as for example an average minidisc player (https://www.minidisc.wiki/equipment/sony/portable/mz-g750) which could often weigh less than 100g.

The very first cassette Walkman was about 40 grams light: https://www.soundandvision.com/content/flashback-1979-sony-s...

The Rio MP3 player was 109 grams: https://arstechnica.com/gadgets/2016/10/diamond-rio-pmp300-m...

The classic Creative Nomad weighs in at 45g including battery: https://www.crutchfield.com/S-HglCxgxN2we/p_053NX128/Creativ...