The package includes two DMG servos with a weight of 4.8g each, and a 4.8V NiMH 300mAh Rx battery, along with a battery extension wire that serves as a lightweight alternative to a switch. All of these components feature universal style connectors, specifically Hitec/JR connectors.
Here are the specifications for the DMG servos: they have a size of 18.8 x 7.8 x 21.5mm and a maximum torque of 0.8 Kg cm at 4.8V. The speed is 0.08s for 60°, and the motor is coreless with a digital driver. The drive train is composed of metal gears.
As for the Rx battery, it has a voltage of 4.8V (4 cell 1/3AA), a capacity of 300mAh, and a weight of 31g. Its dimensions are 57 x 29 x 15mm, and it can be charged at 100-250mA (an automatic charger with NiMH mode is recommended).