I have tested those modules you have sent us and they work very well. However I have just discovered that we cannot use a transmitter with that much power at 433.92MHz. The Max allowable is 25mW or 14dBm @ 433MHz. We have 2 options, switch to your TWS-DS-3 or can you lower the frequency on your TWS-HS-3 to under 868MHz?
For the law, please try to use TWS-DS3 and the output power will meet your law. If your application is need far distance, TWS-HS just can fit your need but please try to decrease output power so that it will meet your law. Now I use TWS-DS3, the output is too high. How to solve it?
Put lower input voltage to TWS-DS so that their question can be solved. What`s the difference on TWS-DS & TWS-BS?
TWS-DS key features are as below: 1. Lowest voltage can be low up to 1.8V. (TWS-BS needs 3V) 2. Output power is bigger and it can up to 16dBm. (TWS-BS is 8dbm.) 3. Current type has many selections.

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