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Dear Sir,Our Freeshipping is â€œSeller’s Shipping Methodâ€,Tracking number will be like â€œ5100029666064â€,this tracking number only can be tracked before it arrive the Airport of your country.DO NOT CHOOSE THIS OPTION IF YOU DON’T LIKE IT.
Please choose â€œChina Post Air mailâ€ if you need tracking number like this â€œRI254747030CNâ€,This number can provide a full tracking info.
We also provide Free China Post Air mail number if the order is bigger than $35.
Contact us if you find our price higher than others
1. size: 32mmX22mmX27mm
2. Chip: LM393, ZYMQ-2 gas sensors
3. Working voltage: DC 5V
1>. with a signal output instruction.
2>. dual signal output (analog output, and TTL level output)
3>. TTL output
4>. 0~5V analog output voltage, the higher the concentration the higher the voltage.
5>. the gas, natural gas, city gas, smoke better sensitivity.
6>. with a long service life and reliable stability
7>. rapid response and recovery characteristics
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|Shipping Company||Shipping Cost||Estimated Delivery Time|
|3 - 7 days|
|3 - 7 days|
|5 - 14 days|
|Post Air Mail||Free Shipping||15 - 45 days|
|Return Policy||If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.
N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
|Seller Service||On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).|