Brand new and in the box!
Specifications
this is it from amazon:
https://www.amazon.com/dp/B07N3C5WRG?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1
Module: 2.4" W x 1.3" H x 0.4" D (62 mm x 34 mm x 11 mm)
Strap Length: Adjustable from 25" to 52" (63.5 cm to 132 cm)
Weight: 1.9 oz (54.4 g)
Water Resistance: 1 ATM
Battery: User-replaceable size CR2032 (3 volts)
Battery Life: Up to 3.5 years (based on average use of 1 hour per day)
Operating Temperature: 23°F–122°F (-5°C–50°C)
Radio Frequency/Protocol: 2.4 GHz ANT wireless communications protocol; BLUETOOTH Wireless Technology 5.0
Range: 3 m
System Compatibility: ANT+, BLUETOOTH