No—most (like oraimo’s) use Bluetooth, AUX, or FM, no Wi-Fi needed.

Yes—they use batteries (e.g., oraimo Wrap has 1500mAh) or can be plugged in.

A device with Bluetooth (phone, etc.) to connect, or AUX cable/memory card (like oraimo models).

Yes—models like SoundFlow support "playing while charging," so it’s okay.

Very—Wrap and Palm have IP67 rating, surviving water and dust (great for outdoors).

Wrap: up to 10 hours; Palm: ~4 hours; SoundFlow: 4–6 hours—varies by model.

Yes—SoundFlow supports TWS pairing to make stereo sound with two speakers.

It has a Velcro strap to wrap around backpacks, bike handles—easy to carry outdoors.