Module: communication | FireBeetle | GPIO | 3.3VDC | 1km | 915MHz
Module robotics: Li-Po/Li-Ion charger | 5VDC | USB micro | TP4056X
Module: audio | audio files playing module | 3.3VDC | IC: WTV020SD
Wheel | yellow-black | Shaft: two sides flattened | Pcs: 2 | push-in
Antenna | red | 12g | SMA | 5.8GHz | 35x62mm | 50Ω | Antenna: WiFi | 3dBi
Module robotics: expander | 3.3÷5VDC | Gravity,I2C | CH423 | OUT: 16
Wheel | red | Shaft: knurled | push-in,screw | Ø: 60mm | Shaft dia: 4.8mm
Motor: servo | 4.8÷6VDC | micro | analogue | 23x12x27mm | 180°
Module: audio | decoder | SPI | 5VDC | IC: VS1003B | Mounting: screw
Converter: step down | Uout: 12V | Uin: 12.2÷50V | 600mA | 13x10mm
Module: Li-Po/Li-Ion charger | 5VDC | USB B micro | 1A | 8.4V | 28x37mm
Sensor: gas level | carbon monoxide (CO) | 3.3÷5VDC | 13x13x2.5mm
Sensor: gas level | methane (CH4) | 3.3÷5VDC | 13x13x2.5mm | -10÷50°C

