It says rechargeable in the headline but nowhere else. If it is rechargeable how long on continuous use please

Yes it is,about a hour on battery.

What altitude can his be used at?

The efficiency drops with rising altitude.

How do you charge this machine to take it out side lido not under stand the instructions at all and i am desperate to try this machine out

Plug the battery pack into the machine, and connect the other end of the battery lead into a charging point for a long period of time, (an hour or two). the battery must remain connected when in use. After that its trial and error to get the desired flow rate

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Portable Oxygen Concentrator travel with Removable Rechargeable Battery oxygen+concentrator Rechargeable Oxygen Machine with Nebulizer Function Oxygen Generator for Home and Travel Car Use

Product ID: 508138809

⚡2200mAh rechargeable battery

🔇ultra-quiet 45dB operation

🚗car adapter for travel use

Description

🌬️ Breathe Easy, Anywhere — Oxygen Freedom in Your Hands

RECHARGE REPLACE - Removable 2200mAh battery offers 1-1.5 hours runtime; upgradeable with optional 5500mAh battery.
WHISPER QUIET COMFORT - Operates at just 45dB, ensuring peaceful sleep and discreet use in public spaces.
DUAL POWER FLEXIBILITY - Works seamlessly with AC 110/220V and car adapter for uninterrupted oxygen supply anywhere.
CUSTOMIZABLE OXYGEN FLOW - Simple one-knob control with 4 preset durations up to 4 hours for personalized use.
EFFORTLESS OXYGEN ON THE GO - Lightweight 1.88kg design fits perfectly in your travel bag or car.

This portable oxygen concentrator by Ywanwj delivers a steady 29% oxygen concentration at 3LPM with ultra-quiet 45dB operation. Weighing only 1.88kg, it features a rechargeable 2200mAh battery with up to 1.5 hours runtime, extendable via an optional larger battery. Designed for travel, it supports dual power sources including car adapters and AC outlets, with a simple one-knob control system offering preset usage durations up to 4 hours. Ideal for active professionals seeking reliable oxygen support on the move.

Specifications

ASIN	B0BTM68V21
ASIN	B0BTM68V21
Best Sellers Rank	264,762 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 539 in Oxygen Therapy
Brand	Ywanwj
Country of origin	China
Customer Reviews	2.4 2.4 out of 5 stars (15)
Customer reviews	2.4 2.4 out of 5 stars (15)
Date First Available	1 Feb. 2023
Guaranteed software updates until	unknown
Manufacturer	Ywanwj
Manufacturer reference	5649864998489
Package Dimensions	12 x 12 x 6 cm; 2 kg
Units	1.00 count

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