Can this be plugged directly into an iphone for conducting teleconferencing?

This headset does have Bluetooth connectivity for cell phones, but according to the manual "the microphone will not transmit unlessplugged into an intercom." I played around with my Galaxy S3, and that held true. I think you need a plane to go with it if you want to use it for teleconferencing, which would be both expensive and hard to fit in your laptop bag.

Can music be played through the Bluetooth while not plugged into the aircraft?

In the ones I have, Bluetooth can only be used for phone calls, not for streaming music. For music you use the regular 3.5mm jack. I have never used them outside the aircraft so I can comment on the wired music experience

Does this product come with a warranty?

The Lightspeed does come with factory warranty. In order to utilize the warranty, your headset must be registered with Lightspeed. By the way, the Sierra is by far the most comfortable headset I ever wore.

has anyone tried them for Kids around 5? do they seal good to provide the same level ANR

I think they should be OK. I've flown with the grandkids (now 7 and 9, but also earlier) and they seem to be happy with these, the older version, or the old standard David Clarks. Key is that the headband has to be adjusted to its shortest setting for a smaller head. Good luck.

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Lightspeed SIERRA ANR Aviation Headset

Product ID: 299347622

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🎧Lightweight Comfort

🔇Advanced Noise Cancellation

🔋Long-lasting Battery Life

Description

✈️ Elevate your flight with silence and style.

POWER THAT LASTS - Powered by 2 AA batteries, stay airborne longer with reliable, easy-to-replace power.
FEATHERLIGHT DESIGN - At just 32g, experience all-day comfort without fatigue, perfect for long flights.
CRYSTAL CLEAR COMMUNICATION - Industry-leading noise cancellation ensures you hear—and are heard—without distraction.
EFFORTLESS WIRELESS FREEDOM - Cut the cords and enjoy seamless wireless connectivity for ultimate cockpit mobility.
SLEEK PROFESSIONAL AESTHETIC - Matte black finish complements your pilot gear with understated style and durability.

The Lightspeed SIERRA ANR Aviation Headset combines cutting-edge noise cancellation, wireless convenience, and ultra-lightweight design to deliver premium comfort and crystal-clear communication for professional pilots. Powered by 2 AA batteries, it ensures reliable performance on every flight.

Specifications

Product Dimensions	38.1 x 33.02 x 22.86 cm; 453.59 g
Batteries	2 AA batteries required.
Item model number	Sierra
Special features	noise cancelling
Other display features	Wireless
Colour	black
Manufacturer	Lightspeed
Country of Origin	USA
Item Weight	453 g

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