37 in 1 Box Sensor Modules Kit for Arduino

Price range: $6.43 through $7.50
Package included: 1x Small passive buzzer module 1x 2-color LED module 1x Hit sensor module 1x Vibration switch module 1x

ESP8266 ESP-01S ESP01S WiFi module

Price range: $0.88 through $1.49
This is WiFi serial transceiver module, based on ESP8266 SoC which has integrated TCP/IP protocol stack.