Description: Cell battery holder, with switch installed on the board, in-line with the power You can shut off your project and save batteries Slide switch is the same as the lilypad slide switch board, not easy to accidentally turn off or on USB to TTL support 3.3V 5V FT232 Arduino Lily Pad 328 dedicated mini USB connector Using USB2.0 best FT232RL chip, the USB is converted into serial port Specification: Lilypad coin cell battery holder: Holds a 20mm coin cell battery (such as CR2032) and gives you 4 connection points (2 positive, 2 negative) for sewing into your project. Size: Approx. 28x6mm/ 1.10x0.24 inch USB to TTL Serial Adapter Module: Support 3.3V 5V FT232, for Arduino lilypad 328 dedicated mini USB connector Has two power versions. Small size, mini USB interfaces row female connector, with supporting LilyPad328 download Material: Plastic Color: Red Size: Approx. 21x19x5mm/ 0.83x0.75x0.20 inch Package Includes: 1 Piece of Lilypad Coin Cell Battery Holder 1 Piece of FT232 USB to TTL Serial Adapter Module