The syma s37 remote control helicopter is a large model measuring 47cm in length with a rotor span of 35cm this 3 channel remote control helicopter is not only large but fast too complete with a high and low speed switch on the controller to give the pilot a greater level of control couple this with the enhanced controller that features an lcd display 2 4g operating frequency and a control range of up to 45 metres and this helicopter is a very appealing choice for customers looking to fu