Sela-SG uses long range, low power radio frequencies occupying the ISM bands in the wireless spectrum below 1 GHz, this avoids the much more crowded band at 2.4 GHz, where Wi-Fi, Bluetooth, ZigBee and other wireless protocols operate.

EnclosureNylon, Waterproof, Dustproof, IP67 (Ingress Protection)
Temperature-20 ℃ to 40 ℃ (-4 ℉ - 104 ℉)
Range1000 Meters (3280 Feet) Bluetooth only works within 100 Feet of your phone
DisplayDiffused Front Panel, Red, Green, Blue, Yellow, LEDs
Speaker1 Watt, 96 dB (Decibels), Polyester, Cone Polyethylene Terephthalate (PET)
LED Brightness350 mcd (Microcandela)
Frequencies868 Mhz, 915 Mhz, 50 kbps 2G Frequency-shift keying
North America915 Mhz, FCC ID 2ANH5-RC-CC1310-915, Part 15C
Europe868 Mhz, CE Certified, Radio Equipment Directive 2014/53/EU
Diameter50.4 mm (2 Inches)
Height15 mm (0.560 Inches)
Weight32 Grams (1.3 Ounces)
BatteryLithium Polymer (LiPo), 3.7 Volt, 450 mAh
Battery LifeMixed use, 90 days on a single charge
ChargeUSB Micro-B, Input voltage, 5 Volts, 500 mA (max)
Motion16 bit 3 Axis Accelerometer
EnclosureABS, Waterproof, Dustproof, IP67 (Ingress Protection)
Battery SizeCR2032
Battery Life1 Year