Battry Cap With DC Jack Works great for Arduinos, development boards, evaluation boards and more. It has so many uses can easily connect the other end to anything with a 5.5 x 2.1mm excellent material, fine workmanship It is an environmental 9V battery buckle  the cable is used to battery-power any device that needs 9V and has an on-board barrel jack it has T- fonts, with red and black connecting lines.Can plug a 9V battery into one end and connect the other end.

5S 4.2v li-ion Balancer Board(BMS HX-JH-008) is used in lithium Polymer Li-ion Li-Po lipo battey cell Charge four batteries at once Charge from 2S to 5S Lithium batteries Balances each individual cell of each battery has convenient T-Style battery connector Replaceable DC input fuse Replaceable battery port fuses Suitable for 2, 3 or 4 string 18650 batteries or polymer lithium battery series combination Battery internal resistance differences within 5 milliohm, voltage within 0.03 V voltage, capacity vary within 50 ma Cut-off Voltage is according to the BMS setting Daisy chain multiple boards for additional charging.Contains 4mm gold bullet input connectors. Self-resetting polyfuses protect balance circuits.

Lipo Tester is used for detecting 1S-8S lithium battery voltage. It help to protect battery form overcharge and over discharge.   The buzzer with red led flash when the voltage is below the set point. The default setting is 3.3V that can be changed. This lipo tester is applicable for 1S-8S / Lipo / Li-ion / Li Mn / Li-Fe battery, RC Quad copter, helicopter, multicopter, car, boat and airplane etc. 

 The TECI-12706 Thermocouple Module is a semiconductor based electronic component that works as a small heat pump. This thermocouple create a temperature differential on each side i.e. one side gets hot and other side gets cool.  To avoid burn of the module it must be used in conjunction with a heat sink. The module has 127 couples in-built. It is mostly used in computer CPU, portable refrigerators, Temperature stabilizer, Liquid cooling, Photonic and medical systems and many more. It is also knows as Thermoelectric cooling module, Peltier modules, Thermoelectric modules.

2S Li-ion Lithium Battery Charger Protection Module Board (FDC-2S-02) is mostly used for protecting the lithium ion batteries from over-charging, over – discharging, over-current loads, and short circuit protection. It is highly accurate voltage detection circuit and ensure that the battery pack is absolutely safe and reliable

This module is used for displaying current and voltage of a device. It has dual display in red colour.The refresh rate is 500ms per times. It is suitable for electric cars / motorcycles battery monitoring and many more.

The Logic level converter module is a bi-directional converter that is used for the connection between two devices of different digital voltage levels. For example: connecting an Arduino (5V device) to a device of 3.3V power supply. It has 2 rows with 6 contact pins. 

The 4 AA Battery Holder is holder that is made of polypropylene and has three slots to hold in batteries. This battery holder uses 4 AA cells to power electronics, robotic or embedded project.

The KQ330 Module is a power line communication module. It is designed to communicate between two devices directly through power line (e.g 220V power line) without any extra components. It has Interface baud rate of 9600bps. It is designed with high withstand voltage and anti high pressure shock for communication between two devices. It uses regulated 5V, 500mA power supply. It is suitable for either residential (at-home) or commercial (offices, apartments, hotels, warehouses) network applications, which utilize power lines.

The 30A Split Core Current Transformer is a non-invasive current transformer. It helps to build our own personal energy monitor. It needs nominal input current range of 0A to 30A. It is suitable for the current measuring monitoring and protection process. It is applicable in various fields like: - AC motors, lighting equipment, air compressors and many more.

The 100A Split Core Current Transformer is a non-invasive current transformer. It helps to build our own personal energy monitor. It has input current rating of 100A and output current rating of 50mA.  It is suitable for the current measuring monitoring and protection process. It is applicable in various fields like: - AC motors, lighting equipment, air compressors and many more.

The Breadboard Power Supply Module is a  power supply module that is compatible with  3.3V/5V power. It makes easy  connection between every electronic components.