What is the frequency response of these headphones?

The frequency response is 20Hz-20KHz.

What is the wireless range of these KVIDIO Bluetooth headphones?

The wireless distance is 10 meters.

Questions & Answers: KVIDIO Bluetooth Headphones Over Ear, 65 Hours Playtime Wireless Headphones with Microphone, Foldable Lightweight Headset with Deep Bass, HiFi Stereo Sound Low Latency for Travel Work Cellphone

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KVIDIO Bluetooth Headphones Over Ear, 65 Hours Playtime Wireless Headphones with Microphone, Foldable Lightweight Headset with Deep Bass, HiFi Stereo Sound Low Latency for Travel Work Cellphone

Sound quality: Dual 40mm drivers deliver rich, low latency stereo sound suited to music listeners, audiophiles, and home audio use.
Comfort and fit: Memory protein foam ear cushions and an adjustable headband provide all day comfort without pressure on the ears. The headphones fold and weigh only 0.44 pounds, making them suitable for travel, workouts, and daily use.
Connectivity and calls: A multi function button enables quick pairing, and the headphones are compatible with Bluetooth devices as well as any device supporting a 3.5mm cable. A built in microphone supports hands free calls and video meetings.
Battery life: Bluetooth 6.0 provides a stable connection up to 33 feet. The 500mAh battery recharges in about 2.5 hours and delivers up to 65 hours of playtime, with a wired mode available as backup when the battery runs low.
Package contents: Includes the headphones, a 3.5mm backup audio cable, a USB charging cable, and a user manual.

$24^.99 –