Features 1.The small size is suitable for all kinds of embedded type 2.Self projectile card slot, convenient change mobile phone card. 3.Using the IPX interface, can arbitrarily change the antenna 4.The board treated by gold plated, more stable performance. 5.Wiring neat guarantee board guarantee board more stable in running Specification This module power supply for 5 v, computer debug USB to TTL serial port. Power supply can output current of 800 mA, TTL serial interface is compatible with 3.3 V and 5 V single chip microcomputer.Can be connected directly with microcontroller. The IPX antenna, the antenna interface can be arbitrary switching PCB antenna, glue stick antenna and suction cups. Data 4 frequency communications, available in the world. Features: The small size is suitable for all kinds of embedded type Self projectile card slot, convenient change mobile phone card. Using the IPX interface, can arbitrarily change the antenna The board treated by gold plated, more stable performance. Wiring neat guarantee board guarantee board more stable in running Adding a protection device, which can realize anti reverse connection protection, high voltage protection, reduce the loss of the board, suitable for project and to learn. Specification: Power supply: 5V Compatible: 3.3 V and 5 V Weight: Approx.18g/0.6oz Package list: 1 x Module With Antenna Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List