From Makers Electronics's description

SIM808 GPS-GSM-GPRS Module The SIM808 is a compact, surface-mount communications module that integrates a GSM/GPRS modem and a GNSS receiver into a single SMT package. It was designed to let product designers add cellular voice/data and satellite positioning without integrating multiple separate chips, saving board area and reducing development time. The unit exposes industry-standard interfaces (UART/USB/GPIO/ADC/PCM and antenna pads) and is controlled with standard AT commands. Onboard firmware supports data protocols and networking stacks so the host can send/receive SMS, voice and packet data (GPRS) while the GNSS engine supplies position data in standard NMEA formats. Emphasizing ease of integration, the SIM808 combines power-management modes and an embedded feature set (AT control model, TCP/IP stack support and accessory interfaces) so it can be embedded into battery-powered trackers, vehicle telematics, and other location-aware devices with minimal external components. Features: Integrated GSM/GPRS modem and GNSS (GPS) receiver in a single SMT module. Quad-band cellular support and GPRS data capability. Controlled via standard AT command set (3GPP + SIMCOM enhancements). Embedded TCP/IP, FTP/HTTP and SSL stacks (for data services). Multiple interfaces: UART, USB, GPIO, ADC, PCM, SIM interface and antenna pads. Low-power design with sleep modes for battery applications. Optional Bluetooth and other firmware-dependent features. Specifications: Parameter Value Cellular bands: Quad-band 850 / 900 / 1800 / 1900 MHz. GPRS: Multi-slot class 12/10; mobile station class B; max ~85.6 kbps. Supply voltage: 3.4 – 4.4 V (recommended ~4.0 V). Dimensions: 24 × 24 × 2.6 mm. Weight: ~3.3 g. Operating temperature: −40 °C to +85 °C. GNSS receiver: 22 tracking / 66 acquisition channels, L1 C/A. GNSS sensitivity: Tracking: −165 dBm; Cold start: −148 dBm. GNSS TTFF: Cold: ~32 s; Warm: ~3 s; Hot: <1 s. GNSS accuracy: Horizontal < 2.5 m (CEP). Interfaces: 68 SMT pads incl. analog audio, PCM (opt), SPI (opt), USB, UART, SIM, GPIO, ADC, antenna pads. Certifications: CE, FCC (and related regional certificates). Applications: Vehicle tracking and telematics. Asset & logistics tracking. Personal tracking (wearables/pet trackers). Remote monitoring and telemetry systems. IoT data acquisition and wireless sensors. Security & alarm communication. Package Contents: 1× SIM808 module. 1× GSM (cellular) antenna. 1× GPS antenna. Datasheet

From Micro Ohm's description

SIM808 Bluetooth Compatible GSM/GPRS/GPS Module SIM808 Bluetooth Compatible GSM/GPRS/GPS Development Board With GPS Antenna (Arduino and Raspberry Pi Compatible) is a development board; with SIM808 module which makes you able to use GSM communication and GPS features with your Arduino or Raspberry Pi. With this module, you can send and receive SMS; trace a location and you can even build your own cell phone.SIM808 module on-card functions as GSM communicator and GPS receiver. The module is 5 – 26V power supply when the power supply is less than 2A the need for 9V This. Direct. Road power supply port for Another 3.5 – 4.2V suitable lithium for battery power supply. Computer debugging USB – TTL can be.is suitable portable. Two sets of SMA antenna port presented the GPS and GSM antenna. two sets of IPX port, easy to embed in the aluminum box to lead out the antenna. 1 way of TTL serial port, the GPS and GSM functions can be arbitrarily switched. To use this module, you have to buy a Bluetooth antenna separately. GPS and GSM antennas are included in the set. Note : Version may be different in actual product. Features : SIM808 GSM : Supports Quad-band 850/900/1800/1900MHz, compatible with all 2G networks all around the world. Inner MT3337 GPS receiver, -165dBm precision, control on a same serial port. Earphone/ microphone outputs on a card or external 32-ohm speaker + supports voice calls with an electret microphone. Sending and receiving SMS. Sending and receiving GPRS data (TCP/IP, HTTP vb). UART communication with automatic baud rate settings. GPRS multi-slot class 12/10 GPRS mobile station class B Comply with GSM phase 2/2 + Class 4 (2 W @ 850 / 900MHz) Class 1 (1 W @ 1800 / 1900MHz) Support low power consumption mode: 100mA @ 7V-GSM mode Support AT command control (3GPP TS 27.007,27.005 and SIMCOM enhanced AT Commands) Supports GPS satellite navigation technology Support LED status indicator: Power supply status, network status, and operating modes Working environment: -40 ℃ ~ 85 ℃ SIM808 GPS : 22 tracking/66 acquisition channel GPS L1 C/A code Precision: Tracking: -165dBm, Cold start: -148dBm Finding Location Time(typical): Cold start: 32sn, Hot start: 1sn, Warm start: 5sn Accuracy: ~2.5m How to use? Click Here . SIM808 library Click here . Hardware configurations : 1 Connect the USB-TTL to the UART interface USB-TTL SIM808 TXD RXD RXD TXD GND GND Insert the valid SIM card to the SIMCARD holder. Connect the GPS antenna and GSM antenna to the board. Connect the power adapter to the DC044 Interface. Change the switch. Press the POWKEY button for 2 seconds, the SIM808 module will work and the other 3 LEDs will light. SIM808 GSM/GPRS/GPS Bluetooth Compatible Development Board Information : Package Includes : 1 x SIM808 Bluetooth Compatible GSM/GPRS/GPS Module. 1 x GPS antenna with SMA male connector. 1x IPX GSM antenna with SMA male connector. Item Type: Module Module Type GPRS Module, GPS Module, GSM Module Voltage Rating (VDC): 5 Input current (min) 2A Accuracy (meter) Approx 2.5 Dimensions (L x W x H) mm 80 x 50 x 14 Weight (gm) 30 Shipping Weight 0.05 kg Shipping Dimensions 10 × 6 × 2 cm Sim808 Datasheet: DOWNLOAD GPS Antenna Datasheet: DOWNLOAD

From Future Electronics Egypt's description

SIM808 module is a GSM,GPRS and GPS three-in-one function module. It is based on the latest GSM/GPS module SIM808 from SIMCOM, supports GSM/GPRS Quad-Band network and combines GPS technology for satellite navigation. It features ultra-low power consumption in sleep mode and integrated with charging circuit for Li-Ion batteries, that make it get a super long standby time and convenient for projects that use rechargeable Li-Ion battery. It has high GPS receive sensitivity with 22 tracking and 66 acquisition receiver channels. The module is controlled by AT command via UART and supports 3.3V and 5V logical level. The module can used easily for realtime tracking applications. The tracking is done by reading the GPS coordinates (longitude and latitude) and then sending them by using a HTTP request to a web server. Then you can use any internet browser to load the PHP webpage such as Google maps to show the location in realtime. You send location by sms message. The module have many useful features, you can connect it to Arduino or Raspberry pi using TX and Rx pins. It can be powered by 5V battery power supply or lithium ion battery . Board Description: Features Controlled by AT Command Voltage Input : 5 - 20 V Quad-band 850/900/1800/1900 MHZ Supports Real Time Clock Supports 3.0V to 5.0V logic level Low power consumption, 10mA in sleep mode Supports GPS NMEA protocol Micro SIM card holder Support LED status indicator: Power supply status, network status and operating modes PCB size: 53mm X 48mmX1.6mm Package Includes: 1 X SIM808 Moudle 1 X GSM Antenna 1 X GPS Antenna Detailed user manual for SIM 808 GPS, GSM, GPRS module. SIM 808 Arduino codes (GPS-SMS, GPS, SMS) SIM 808 GPS application notes