One unit, one price, shipped within the United States. You choose its application firmware at checkout — BFi53ER0-BF Battery-free Bluetooth or BFi53ER0-MB Modbus TCP & Bluetooth Mesh. Pay by credit or debit card through PayPal — no PayPal account is needed, and FLSEMI never sees or stores your card number. For quantities, for shipping outside the United States, or for the BFi53ER0S, use the order form instead. Most people who buy one are sizing a project rather than buying a box — what happens after that is worth two minutes.
BFi53ER0 — Bluetooth 5.3 with on-board front-end module, 10/100M PoE+, RS-485 (A/B), 0–10 V I/O, in an extruded aluminium enclosure. Made in Taiwan. Full specification →
| Unit price | $420.00 |
|---|---|
| Shipping — US domestic ground, packed and insured | $25.00 |
| Processing & handling | $17.00 |
| Florida sales tax (Osceola County, 7.5%) | Added at checkout for Florida delivery addresses only |
| Total, outside Florida | $462.00 |
This price is today’s price. Component cost, freight, duty and exchange rates move, and this figure moves with them — it can change without notice. What governs is what the checkout page shows at the moment you pay; nothing changes afterwards for an order already placed.
Paying here accepts the terms below — warranty, cancellation and returns, tax and destination. Read them first; they are short.
What the processing charge is. $17.00 is what the payment processor takes on an order this size — PayPal charges 3.49% of the total plus $0.49 — and it is passed through at cost rather than buried in the unit price. It is the same on every order placed through this page, whatever payment method you choose. Order the same unit on a proforma invoice paid by bank wire and this line does not arise.
The button opens a PayPal-hosted payment page. Card details are entered there, on PayPal’s own page — they never pass through this website, and FLSEMI keeps no card on file.
12-month limited warranty against defects in materials and workmanship, running from the date of shipment. Our sole obligation, and your sole remedy, is repair or replacement at our option. A return material authorisation is required before any return.
This is industrial equipment sold to businesses and developers for integration work. It is not a consumer product, and it is not supplied on approval or for trial.
Before despatch — cancel and the payment is refunded in full, less any cost already committed on a configuration built to your specification.
After delivery — a return needs our written agreement and a return material authorisation number issued in advance; anything arriving without one is refused at the sender’s expense. The request must reach us within 14 days of delivery, and the unit must come back unused, unpowered, unmarked and complete in its original packaging, carrying the serial number we recorded at despatch. Approved returns carry a 15% restocking charge, and neither the outbound nor the return shipping is refunded.
Not returnable — a unit that has been installed, wired, powered, opened, re-flashed or modified. That unit is covered by the warranty instead.
Integration effort is not a defect. A unit that performs to the published specification is not returnable because a project changed, because a third-party device behaved differently than expected, or because the work took longer than planned. Bring us the problem first — bring-up support comes with the purchase and usually settles it.
Prices are in US dollars. Florida sales tax is collected at checkout on Florida delivery addresses. Buyers in other states are responsible for any use tax due in their own state. If you hold a valid resale or exemption certificate, send it to us before paying and we will handle the order by invoice instead.
A gateway on your bench answers the questions a datasheet cannot: whether your meters answer the way their manual says, what the building does to a radio link, how long your data really takes to reach the host. That is usually where the real project starts — and it is the part we are actually in business for.
You get an order confirmation by e-mail. The serial number is recorded against your order, and it ships with a tracking number — within two business days from the Florida shelf, or about two weeks if it has to be built. Bring-up support comes with it — wiring, device or register mapping, first data into your host. Ask before you fight it.
The single most useful thing you can send us is a paragraph about the site: what you are measuring, what is already installed, where power and network reach, and the date that matters. We will tell you honestly whether the standard firmware covers it or whether it needs engineering — and if it is covered, we will say so and leave you alone.
A protocol nobody has written a driver for. A field device that answers out of spec. A radio link that has to cross a site the standard build was not designed for. Your brand on the enclosure and your defaults in the firmware. We write the stack ourselves — the DECT NR+ MAC in this product line is ours, to ETSI TS 103 636 Release 2 — so the answer is usually not “that is not supported”.
This page sells one configuration to one destination country. Everything else — volume, OEM, the BFi53ER0S, export outside the United States — goes through the order form, where we confirm configuration and delivery date before any invoice is issued. The full terms of sale are on the ordering page.