SainSmart USB Host Android ADK Shield 2.0 for Arduino UNO MEGA R3 Mega2560 Duemilanove Nano Robot Built well and works pecfectly Has 5 Servo Ports. nRF24L01 Port supplies Wireless device. Supports Android devices : Tablet PC v3.1 and Mobile Phone v2.3.4 and above with Google Open Accessories API (ADK). Compatible with Arduino Mega 2560, Arduino Uno 328, Arduino Diecimila/Duemilanove 328. Supports USB HOST mode and support HUB protocol