MrRCSound Sound System V4.1 With TT-25 For RC Helicopters "autotag-email" Adjustable battery holder for most

Adjustable battery holder for most common LiPo batteries

These variations do not affect flight performance and can be easily adjusted by an experienced builder with proper tools

All control surfaces come out of the box fully prehinged and installed for your convenience

and Wright Cyclone (T-28)

MrRCSound Sound System V4.1 With TT-25 For RC Helicopters "autotag-email" Adjustable battery holder for mostMrRCSound version 4. 1 Sound System for RC Helicopters MRS023 This 4. 1 version sound system comes with TT 25 speaker and is specifically made for RC helicopters. Version 4. 1 with a set of 5 sounds plus auxiliary sound set. Single TT 25 included, 2 speaker capable. Sounds include: MD 500, Bell 222, UH 1, Blackhawk, Bell 47. Features of the TT 25 speaker Speaker weighs only 3 ounces Only 2" diameter and 1" thick No need to cut holes in your helicopter