Also selling for $69.99 @ Pushys but less stores to collect from. Free shipping for orders over $99 same as 99 Bikes.
Have been looking for a heart rate monitor that can be linked to my bike computer and found this Garmin model is on sale.
Specifications:
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
Also found some cheaper alternatives for less than $50 but it seems reviews are not that great:
Jet Black Heart Rate Monitor with Dual Band Technology (Bluetooth / ANT +) Soft Strap $40 @99 Bikes
Magene H603 Chest Strap Heart Rate Monitor $49 @99 Bikes
IGPSPORT HR40 Heart Rate Monitor $46.2 Free Shipping @IGPSPORT Australia
Note: I use an IGPSPORT bike computer and it was a fantastic device, have not yet try their other products though.
Magene H303 from AliExpress is hard to beat for value.