Note: Control board was upgraded to English version, without open source. Le Arm info & attention for reference: Click Herei OS APP download: Click Here Android APP download: Click Here Feature: Support Android/i OS phone, handle, PC controlling Working time lasts 60mins, 7.5V DC adapter High pricision digital servo Blue metal structure Package Included:1x Robot arm frame (Without assembled)1x Power adapter 1x PS2 transmitter, receiver 1x DC female cable 1x 4.0 bluetooth module 1x Screwdriver 1x Control board 1x USB (Universal Serial Bus) cable 1x LDX-1501MG servo (For bottom board)1x LDX-335 servo (For claw holder)2x LD-218 servo (For robot arm)2x LFD-06 Servo (For robot arm) Some Winding pipe ties