This battery pack is designed for RC enthusiasts using Jumper T16/T18 or RadioMaster TX16S transmitters. It offers a convenient solution by replacing the need for dealing with 18650s. With dimensions of 71x36x20mm and weighing 104g, it's easy to handle. The JST-XH balance lead plugs right into the TX, and it can also power your R9M 900MHz module or TBS Crossfire for long range flying.