ESP-01S Minimodul: esp-01s is a mini wireless serial transceiver module measuring 24.5 x 14.5 x 11.5 mm (L x W x H). This size can be easily embedded in most products ESP-01S WiFi Serial Transceiver Module: esp-01s is the latest version; compared to esp-01, you get a stronger antenna signal and a better network experience with esp-01s Information on parameters: built-in , TKIP, and WAPI engines. 802.11 b/; Supply voltage 3.0-3.6 V (normal 3.3 V); Serial Portrait 4 Mbps; SPI Flash 8 Mbit; Transmission distance 50 meters Widely application: this module is widely used in functional clothing, smart home, home security, remote control, automotive electronics, intelligent lighting, industrial internet of things and other areas Supports three modes: AP, STA, AP + STA coexistence mode, the precise and efficient AT commands make your development easier Colour: as shown Material: pcb Package Contents: 8 x Wireless Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.