{"product_id":"sigmacalc-kalkulator-inzynieryjny-z-wolfram-alpha-i-lte","title":"SigmaCalc — engineering calculator with Wolfram Alpha and LTE","description":"\u003cp\u003e\u003cstrong\u003eA calculator that explains, not just computes.\u003c\/strong\u003e An ordinary, fast calculator day to day. Enter your PIN and it opens a panel with Wolfram Alpha, messages and a memory card — without reaching for your phone.\u003c\/p\u003e\n\n\u003ch3\u003eThe full solution, not just the answer\u003c\/h3\u003e\n\u003cp\u003eType an equation and SigmaCalc reaches Wolfram Alpha over its own LTE modem, then shows the whole path: alternate form, roots, a plot and every intermediate step. You see \u003cem\u003ewhy\u003c\/em\u003e the answer is what it is — the difference between finishing homework and understanding the subject.\u003c\/p\u003e\n\n\u003ch3\u003eA keypad that changes with the screen\u003c\/h3\u003e\n\u003cp\u003eThe on-screen keyboard mirrors the physical one underneath. A single key handles digits, letters and functions — you switch layers with \u003cstrong\u003efun\u003c\/strong\u003e and \u003cstrong\u003eswap\u003c\/strong\u003e, and \u003cstrong\u003esend\u003c\/strong\u003e submits the question.\u003c\/p\u003e\n\n\u003ch3\u003eIts own LTE, no Wi-Fi needed\u003c\/h3\u003e\n\u003cp\u003eA Quectel EG800K Cat-1 modem and six LTE bands. The device works on its own, at school, in a library or on a train. You can also send and receive text messages to stay in touch with home without pulling out a smartphone.\u003c\/p\u003e\n\n\u003ch3\u003eYour data stays yours\u003c\/h3\u003e\n\u003cp\u003eThe extended panel is protected by a PIN you set yourself. Notes, formulas and messages on the microSD card are not available to anyone who simply picks the calculator up.\u003c\/p\u003e\n\n\u003ch3\u003eThree interface languages\u003c\/h3\u003e\n\u003cp\u003ePolish, English and German, switchable in Settings at any time. That is also where you adjust display brightness and contrast, and check battery level and GSM signal strength.\u003c\/p\u003e\n\n\u003ch3\u003eDesigned and assembled in Poland\u003c\/h3\u003e\n\u003cp\u003eSigmaCalc is built in Kraków. Every unit carries a plate on the back with its serial number and hardware revision. Under the service cover you will find the USB-C port, nanoSIM and microSD slots and a RESET button — no need to open the case.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e141 × 139 × 17 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e4.3\u0026quot; FSTN LCD, 240 × 64 px, LED backlight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eProcessor\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eESP32-S3-WROOM-1-N4R2\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eModem\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eQuectel EG800K, LTE Cat-1\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eLTE bands\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eB1, B3, B7, B8, B20, B28\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eBattery\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eLi-Po 3.7 V, 1500 mAh, IEC 62133 compliant\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eCharging\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eUSB-C, up to 700 mA, BQ25176J charger with BMS protection\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eConnectors\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003enanoSIM, microSD, USB-C — under the service cover\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eBattery life\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003eup to approx. 25 h calculating, approx. 5 h with LTE active, over 2 years in deep sleep\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eOperating conditions\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003e0–40 °C, humidity 0–80 %, up to 2000 m above sea level\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eLanguages\u003c\/strong\u003e\u003c\/td\u003e\u003ctd\u003ePolish, English, German\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003csmall\u003eBattery life figures are estimates derived from average current draw.\u003c\/small\u003e\u003c\/p\u003e\n\n\u003ch3\u003eCompliance\u003c\/h3\u003e\n\u003cp\u003eThe device meets the requirements of directives 2014\/53\/EU (RED) and 2011\/65\/EU (RoHS) — EU Declaration of Conformity no. 01\/2026. Electromagnetic compatibility was tested at the Central Laboratory of the Office of Technical Inspection (UDT) in Poznań, test report no. 19.5275_2026_1 of 24 March 2026.\u003c\/p\u003e\n\n\u003ch3\u003eBuy with confidence\u003c\/h3\u003e\n\u003cp\u003e12-month warranty, free software updates and dispatch within 24 hours. Free worldwide shipping.\u003c\/p\u003e","brand":"SigmaCalc Sp. z o.o.","offers":[{"title":"Default Title","offer_id":58225480466763,"sku":"SIGMACALC-V1","price":3499.0,"currency_code":"PLN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1075\/9140\/1803\/files\/01-przod.png?v=1787416469","url":"https:\/\/www.sigmacalc.com\/en\/products\/sigmacalc-kalkulator-inzynieryjny-z-wolfram-alpha-i-lte","provider":"SigmaCalc","version":"1.0","type":"link"}