Case Pack: 3 Description: These wireless foldable headphones offer versatile, hands-free audio with built-in Bluetooth 2.1 and support for micro SD cards (up to 32GB). With a compact foldable design and built-in rechargeable battery, they’re ideal for on-the-go listening. Compatible with nearly all Bluetooth-enabled devices, they deliver up to 3 hours of music time, 3.5 hours talk time, and feature convenient volume controls. Key Features: Foldable, wireless design Bluetooth 2.1 with 33-ft range Plays music from micro SD (up to 32GB, card not included) Up to 3.5 hrs talk time / 3 hrs music time / 240 hrs standby Built-in rechargeable battery (2-hr charge time) Volume control + stereo 3.5mm jack (audio cable not included) Frequency Response: 20Hz–20kHz Sensitivity @1KHz: 110 ±5dB Compatible with most Bluetooth devices Case Pack: 3