The S8550 is a PNP Epitaxial Silicon Transistor. 40V 500mA 2W Output Amplifier of Portable Radios in Class B Push-pull Operation. Complimentary to SS8050.
The HA17741/PS is an internal phase compensation high-performance operational amplifier, that is appropriate for use in a wide range of applications in the test and control fields chips DIP-8 Pins Package.
This is a mini LCD Digital Thermometer for Fridge Freezer, Insert Size 46mm x 26.6mm, Cable Length 1m (Black or White Color) If you open the battery cover to put in two LR44 batteries correctly, pay attention to the polarity.