SONG METER MICRO Birds Tag Product Details Tag weight: 1 gm to 90 gm (depending on BirSpecies) Housing: backpack design, aerodynamic, strong andwaterproof No external antennas GPS receiver:highsensitivity 99 channel module Internal battery: Lithium-Polymer with under- and over-charge protection Fully charged battery is sufficient for logging about 1,000positions without additional GPS logging intervals: from1second to… Continue reading Birds Tag