This is a removable chassis for the MOM OF ALL HEROES GEN 2 PROP KIT BY VERACITY LABS It is a two part chassis. Specs: - Proffie 2.2 - 28 mm Speaker - 18650 Battery - Battery and speaker connector set (Shtok) https://thesaberarmory.com/products/shtokcustomworx-battery-and-speaker-pcb-connector-set?_pos=1&_sid=4e0e326b5&_ss=r - Battery contacts https://www.amazon.de/gp/product/B07JGXTQC9/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1