[Product weight]：10.3±0.1g
[Transmission power]：37dBm
[Communication distance]： 25km
[Product size]： 50*30.9mm
[Introduction]：E22-400T37S is a wireless serial port module (UART) based on SEMTECH's LoRa solution. It has multiple transmission methods, works in the (410.125~493.125MHz) frequency band (default 433.125MHz), LoRa spread spectrum technology, TTL level output, supports 4 5 V - 15V supply voltage.
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E22-900T22U[Transmission power]：22dBm
[Communication distance]：5km
[Product size]： 45.3*27.8*11.2mm
[Product weight]：8.4±0.1g
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E22-400T33S[Product size]：25*40.5mm
[Communication distance]：16km
[Transmit power]：33dBm
[Carrier frequency]：410.125~493.125MHz
[Product weight]：5.8±0.1g
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E22-400T22S[Frequency]：433MHz
[Power]：22dBm
[Size]：16*26mm
[Weight]：2.3±0.1g
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E22-900T30S[Size]：25*40.5mm
[Product weight]：5.8±0.1g
[Frequency]：850.125~930.125MHz
[Distance]：10km
[Power]：30dBm