CULVER CITY, Calif. — Beats' new 360 over-ear headphones went on sale this week at $349.99, and first reviews treat them as a gym-capable cousin of Apple's AirPods Max rather than a studio flagship.

The company announced the set Sept. 22 for order in more than 100 countries, with in-store and delivery availability listed for Sept. 24. Core colors are Black, Cloud, Pink and Sky, each shipping with matching Performance Knit ear-cup and headband cushions. Extra cushion kits were promoted at $9.99 for a limited window in the United States, Canada, the United Kingdom, France, China, Australia and South Korea, then $49.99. UltraPlush kits in Black and Cloud use a leather-like surface. Beats Studio Pro dropped to $299.99 in the United States as the 360 arrived.

Official specifications list a 294.5-gram (10.39-ounce) headset, 165.5 by 191.3 by 87.1 millimeters, Class 1 Bluetooth, USB-C charging and no 3.5-millimeter jack. Battery life is rated up to 32 hours with active noise cancellation and Personalized Spatial Audio on. A five-minute Fast Fuel charge is specified for about an hour of playback. Beats calls the 360 its first over-ear model with an IPX4 sweat-and-splash rating.

Marketing claims 1.75 times the total noise cancellation of Studio Pro and 12 decibels more driver output. Drivers are described as dual-magnet dynamics with three-layer diaphragms. Eight or nine microphones, depending on the briefing, feed ANC, Transparency and Adaptive EQ. A custom Beats chip handles Apple one-touch pairing,........

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