SONOFF ZigBee TRVZB Thermostatic Head, 4 Pack NIIMBOT which significantly reduces file transfer which significantly reduces file transfer times and improves overall device responsiveness 25% Material stiffness 2550±100 MPa Tensile strength 65±6 MPa Tensile strength (Z axis) 25±7 MPa Elongation at break 9±4% Flexural modulus 2900±150 MPa Flexural strength 105±10 MPa Impact resistance (X Y) 30±12 kJ m² Printing conditions Closed chamber The SONOFF TRVZB is a smart ZigBee thermostatic head that allows you to conveniently manage the temperature in individual rooms and better control energy consumption are available on compatible systems